Tìm hai số khi biết hiệu và tỉ số của hai số đó

Home Lớp 5 Toán lớp 5 - Sách Kết nối tri thức Bài 39: Tìm hai số khi biết hiệu và tỉ số của hai số đóBài tập nâng cao

{"common":{"save":0,"post_id":"8368","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"4180","post_id":"8368","mon_id":"1159414","chapter_id":"1159495","question":"N\u0103m nay, b\u1ed1 h\u01a1n con 30 tu\u1ed5i. Bi\u1ebft sau 3 n\u0103m n\u1eefa, tu\u1ed5i con b\u1eb1ng $\\dfrac{3}{8}$<\/span> tu\u1ed5i b\u1ed1. N\u0103m nay, tu\u1ed5i b\u1ed1 là:<\/p>","options":["A.<\/strong> 48 tu\u1ed5i","B.<\/strong> 45 tu\u1ed5i","C.<\/strong> 51 tu\u1ed5i","D.<\/strong> 42 tu\u1ed5i"],"correct":"2","level":"3","hint":"","answer":"Ch\u1ecdn B.<\/strong> 45 tu\u1ed5i.<\/span><\/p>Sau 3 n\u0103m n\u1eefa, b\u1ed1 v\u1eabn h\u01a1n con 30 tu\u1ed5i.<\/p><svg height=\"100\" width=\"320\"> <g> <title><\/title> <rect fill=\"#fff\" height=\"102\" id=\"canvas_background\" width=\"322\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_19\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g> <title><\/title> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"1.27778\" xml:space=\"preserve\" y=\"29.13889\">Tu\u1ed5i b\u1ed1<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"1.27778\" xml:space=\"preserve\" y=\"70.13889\">Tu\u1ed5i con<\/text> <g id=\"svg_63\" stroke=\"null\"> <g id=\"svg_6\" stroke=\"null\"> <line fill=\"none\" id=\"svg_3\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"83.24444\" x2=\"110.31111\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_4\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"82.27778\" x2=\"82.27778\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_5\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"111.27778\" x2=\"111.27778\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_10\" stroke=\"null\"> <line fill=\"none\" id=\"svg_7\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"112.24444\" x2=\"139.31111\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_8\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"111.27778\" x2=\"111.27778\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_9\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"140.27777\" x2=\"140.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_14\" stroke=\"null\"> <line fill=\"none\" id=\"svg_11\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"141.24444\" x2=\"168.31111\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_12\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"140.27777\" x2=\"140.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_13\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"169.27777\" x2=\"169.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_18\" stroke=\"null\"> <line fill=\"none\" id=\"svg_15\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"170.24444\" x2=\"197.31111\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_16\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"169.27777\" x2=\"169.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_17\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"198.27777\" x2=\"198.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_38\" stroke=\"null\"> <line fill=\"none\" id=\"svg_35\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"199.24444\" x2=\"226.31111\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_36\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"198.27777\" x2=\"198.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_37\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"227.27777\" x2=\"227.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_42\" stroke=\"null\"> <line fill=\"none\" id=\"svg_39\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"228.24444\" x2=\"255.3111\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_40\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"227.27777\" x2=\"227.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_41\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"256.27777\" x2=\"256.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_46\" stroke=\"null\"> <line fill=\"none\" id=\"svg_43\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"257.24444\" x2=\"284.3111\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_44\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"256.27777\" x2=\"256.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_45\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"285.27777\" x2=\"285.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_50\" stroke=\"null\"> <line fill=\"none\" id=\"svg_47\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"286.24444\" x2=\"313.3111\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_48\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"285.27777\" x2=\"285.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_49\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"314.27777\" x2=\"314.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_54\" stroke=\"null\"> <line fill=\"none\" id=\"svg_51\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"83.24444\" x2=\"110.31111\" y1=\"64.13889\" y2=\"64.13889\"><\/line> <line fill=\"none\" id=\"svg_52\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"82.27778\" x2=\"82.27778\" y1=\"59.13889\" y2=\"68.13889\"><\/line> <line fill=\"none\" id=\"svg_53\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"111.27778\" x2=\"111.27778\" y1=\"59.13889\" y2=\"68.13889\"><\/line> <\/g> <g id=\"svg_58\" stroke=\"null\"> <line fill=\"none\" id=\"svg_55\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"112.24444\" x2=\"139.31111\" y1=\"64.13889\" y2=\"64.13889\"><\/line> <line fill=\"none\" id=\"svg_56\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"111.27778\" x2=\"111.27778\" y1=\"59.13889\" y2=\"68.13889\"><\/line> <line fill=\"none\" id=\"svg_57\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"140.27777\" x2=\"140.27777\" y1=\"59.13889\" y2=\"68.13889\"><\/line> <\/g> <g id=\"svg_62\" stroke=\"null\"> <line fill=\"none\" id=\"svg_59\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"141.24444\" x2=\"168.31111\" y1=\"64.13889\" y2=\"64.13889\"><\/line> <line fill=\"none\" id=\"svg_60\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"140.27777\" x2=\"140.27777\" y1=\"59.13889\" y2=\"68.13889\"><\/line> <line fill=\"none\" id=\"svg_61\" stroke=\"#005fbf\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"169.27777\" x2=\"169.27777\" y1=\"59.13889\" y2=\"68.13889\"><\/line> <\/g> <\/g> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_20\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(90 255.17080688476562,33.13584899902346) matrix(1,0,0,6.4706099142516775,4.986343383789034,-399.690564926333) \" x=\"246.18706\" xml:space=\"preserve\" y=\"75.24295\">)<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"24\" id=\"svg_21\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"215.27778\" xml:space=\"preserve\" y=\"59.13889\">30 tu\u1ed5i<\/text> <\/g> <\/svg><\/span><\/p>Hi\u1ec7u s\u1ed1 ph\u1ea7n b\u1eb1ng nhau là: 8 – 3 = 5 (ph\u1ea7n)<\/p>Sau 3 n\u0103m n\u1eefa, tu\u1ed5i b\u1ed1 là: 30 : 5 x 8 = 48 (tu\u1ed5i)<\/p>N\u0103m nay tu\u1ed5i b\u1ed1 là: 48 – 3 = 45 (tu\u1ed5i)<\/p>\u0110áp s\u1ed1: b\u1ed1 45 tu\u1ed5i<\/strong>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-01-26 11:16:54","option_type":"txt","len":0},{"id":"4181","post_id":"8368","mon_id":"1159414","chapter_id":"1159495","question":"N\u0103m nay, b\u1ed1 h\u01a1n con 28 tu\u1ed5i. Bi\u1ebft 3 n\u0103m tr\u01b0\u1edbc, tu\u1ed5i con b\u1eb1ng $\\dfrac{2}{9}$<\/span> tu\u1ed5i b\u1ed1. N\u0103m nay, tu\u1ed5i con là:<\/p>","options":["A.<\/strong> 5 tu\u1ed5i","B.<\/strong> 8 tu\u1ed5i","C.<\/strong> 11 tu\u1ed5i","D.<\/strong> 9 tu\u1ed5i"],"correct":"3","level":"3","hint":"","answer":"Ch\u1ecdn C.<\/strong> 11 tu\u1ed5i.<\/span><\/p>3 n\u0103m tr\u01b0\u1edbc, b\u1ed1 v\u1eabn h\u01a1n con 28 tu\u1ed5i.<\/p><svg height=\"100\" width=\"320\"> <g> <title><\/title> <rect fill=\"#fff\" height=\"102\" id=\"canvas_background\" width=\"322\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_19\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g> <title><\/title> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"1.27778\" xml:space=\"preserve\" y=\"29.13889\">Tu\u1ed5i b\u1ed1<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"1.27778\" xml:space=\"preserve\" y=\"70.13889\">Tu\u1ed5i con<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_20\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(90 240.3985595703125,32.13448715209963) matrix(1,0,0,8.1002464332183,4.986343383789034,-529.4918636982775) \" x=\"231.41611\" xml:space=\"preserve\" y=\"77.65161\">)<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"24\" id=\"svg_21\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"202.27778\" xml:space=\"preserve\" y=\"59.13889\">28 tu\u1ed5i<\/text> <g id=\"svg_26\" stroke=\"null\"> <g id=\"svg_6\" stroke=\"null\"> <line fill=\"none\" id=\"svg_3\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"83.13333\" x2=\"107.08889\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_4\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"82.27778\" x2=\"82.27778\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_5\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"107.94445\" x2=\"107.94445\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_10\" stroke=\"null\"> <line fill=\"none\" id=\"svg_7\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"108.8\" x2=\"132.75555\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_8\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"107.94445\" x2=\"107.94445\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_9\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"133.6111\" x2=\"133.6111\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_14\" stroke=\"null\"> <line fill=\"none\" id=\"svg_11\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"134.46666\" x2=\"158.42222\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_12\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"133.6111\" x2=\"133.6111\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_13\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"159.27777\" x2=\"159.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_18\" stroke=\"null\"> <line fill=\"none\" id=\"svg_15\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"160.13333\" x2=\"184.08888\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_16\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"159.27777\" x2=\"159.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_17\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"184.94443\" x2=\"184.94443\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_38\" stroke=\"null\"> <line fill=\"none\" id=\"svg_35\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"185.79999\" x2=\"209.75555\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_36\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"184.94443\" x2=\"184.94443\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_37\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"210.6111\" x2=\"210.6111\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_42\" stroke=\"null\"> <line fill=\"none\" id=\"svg_39\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"211.46666\" x2=\"235.42221\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_40\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"210.6111\" x2=\"210.6111\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_41\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"236.27777\" x2=\"236.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_46\" stroke=\"null\"> <line fill=\"none\" id=\"svg_43\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"237.13332\" x2=\"261.08887\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_44\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"236.27777\" x2=\"236.27777\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_45\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"261.94443\" x2=\"261.94443\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_50\" stroke=\"null\"> <line fill=\"none\" id=\"svg_47\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"262.79999\" x2=\"286.75554\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_48\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"261.94443\" x2=\"261.94443\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_49\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"287.6111\" x2=\"287.6111\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <g id=\"svg_54\" stroke=\"null\"> <line fill=\"none\" id=\"svg_51\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"83.13333\" x2=\"107.08889\" y1=\"64.13889\" y2=\"64.13889\"><\/line> <line fill=\"none\" id=\"svg_52\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"82.27778\" x2=\"82.27778\" y1=\"59.13889\" y2=\"68.13889\"><\/line> <line fill=\"none\" id=\"svg_53\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"107.94445\" x2=\"107.94445\" y1=\"59.13889\" y2=\"68.13889\"><\/line> <\/g> <g id=\"svg_58\" stroke=\"null\"> <line fill=\"none\" id=\"svg_55\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"108.8\" x2=\"132.75555\" y1=\"64.13889\" y2=\"64.13889\"><\/line> <line fill=\"none\" id=\"svg_56\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"107.94445\" x2=\"107.94445\" y1=\"59.13889\" y2=\"68.13889\"><\/line> <line fill=\"none\" id=\"svg_57\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"133.6111\" x2=\"133.6111\" y1=\"59.13889\" y2=\"68.13889\"><\/line> <\/g> <g id=\"svg_25\" stroke=\"null\"> <line fill=\"none\" id=\"svg_22\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"288.46666\" x2=\"312.42221\" y1=\"21.13889\" y2=\"21.13889\"><\/line> <line fill=\"none\" id=\"svg_23\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"287.6111\" x2=\"287.6111\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <line fill=\"none\" id=\"svg_24\" stroke=\"#7f007f\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"313.27776\" x2=\"313.27776\" y1=\"16.13889\" y2=\"25.13889\"><\/line> <\/g> <\/g> <\/g> <\/svg><\/span><\/p>Hi\u1ec7u s\u1ed1 ph\u1ea7n b\u1eb1ng nhau là: 9 – 2 = 7 (ph\u1ea7n)<\/p>3 n\u0103m tr\u01b0\u1edbc, tu\u1ed5i con là: 28 : 7 x 2 = 8 (tu\u1ed5i)<\/p>N\u0103m nay tu\u1ed5i con là: 8 + 3 = 11 (tu\u1ed5i).<\/p>\u0110áp s\u1ed1: con 11 tu\u1ed5i<\/strong>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-01-26 11:17:59","option_type":"txt","len":0},{"id":"4186","post_id":"8368","mon_id":"1159414","chapter_id":"1159495","question":"M\u1ed9t bi\u1ec3n hi\u1ec7u hình ch\u1eef nh\u1eadt có chi\u1ec1u dài h\u01a1n chi\u1ec1u r\u1ed9ng 2 m và chi\u1ec1u dài b\u1eb1ng $\\dfrac{5}{3}$<\/span> chi\u1ec1u r\u1ed9ng. Ng\u01b0\u1eddi ta mu\u1ed1n trang trí dây \u0111èn LED xung quanh bi\u1ec3n hi\u1ec7u \u0111ó, bi\u1ebft m\u1ed7i mét dây \u0111èn LED có giá 60 000 \u0111\u1ed3ng. Tính chi phí mua dây \u0111èn LED.<\/p>","options":["A.<\/strong> 960 000 \u0111\u1ed3ng","B.<\/strong> 96 000 \u0111\u1ed3ng","C.<\/strong> 1 200 000 \u0111\u1ed3ng","D.<\/strong> 560 000 \u0111\u1ed3ng"],"correct":"1","level":"3","hint":"","answer":"Ch\u1ecdn A.<\/strong> 960 000 \u0111\u1ed3ng.<\/span><\/p><svg height=\"100\" width=\"320\"> <g> <title><\/title> <rect fill=\"#fff\" height=\"102\" id=\"canvas_background\" width=\"322\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_23\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g> <title><\/title> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"1.27778\" xml:space=\"preserve\" y=\"29.13889\">Chi\u1ec1u dài<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"1.27778\" xml:space=\"preserve\" y=\"77.13889\">Chi\u1ec1u r\u1ed9ng<\/text> <g id=\"svg_6\" stroke=\"null\"> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"108.27778\" x2=\"149.54249\" y1=\"21.13889\" y2=\"21\"><\/line> <line fill=\"none\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"108.27778\" x2=\"108.27778\" y1=\"14.13889\" y2=\"28.13889\"><\/line> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"148.64543\" x2=\"148.64543\" y1=\"14.13889\" y2=\"28.13889\"><\/line> <\/g> <g id=\"svg_10\" stroke=\"null\"> <line fill=\"none\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"148.64543\" x2=\"189.91013\" y1=\"21.13889\" y2=\"21\"><\/line> <line fill=\"none\" id=\"svg_8\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"148.64543\" x2=\"148.64543\" y1=\"14.13889\" y2=\"28.13889\"><\/line> <line fill=\"none\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"189.01308\" x2=\"189.01308\" y1=\"14.13889\" y2=\"28.13889\"><\/line> <\/g> <g id=\"svg_14\" stroke=\"null\"> <line fill=\"none\" id=\"svg_11\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"108.27778\" x2=\"149.54249\" y1=\"71.13889\" y2=\"71\"><\/line> <line fill=\"none\" id=\"svg_12\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"108.27778\" x2=\"108.27778\" y1=\"64.13889\" y2=\"78.13889\"><\/line> <line fill=\"none\" id=\"svg_13\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"148.64543\" x2=\"148.64543\" y1=\"64.13889\" y2=\"78.13889\"><\/line> <\/g> <g id=\"svg_18\" stroke=\"null\"> <line fill=\"none\" id=\"svg_15\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"148.64543\" x2=\"189.91013\" y1=\"71.13889\" y2=\"71\"><\/line> <line fill=\"none\" id=\"svg_16\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"148.64543\" x2=\"148.64543\" y1=\"64.13889\" y2=\"78.13889\"><\/line> <line fill=\"none\" id=\"svg_17\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"189.01308\" x2=\"189.01308\" y1=\"64.13889\" y2=\"78.13889\"><\/line> <\/g> <g id=\"svg_22\" stroke=\"null\"> <line fill=\"none\" id=\"svg_19\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"189.01308\" x2=\"230.27778\" y1=\"21.13889\" y2=\"21\"><\/line> <line fill=\"none\" id=\"svg_20\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"189.01308\" x2=\"189.01308\" y1=\"14.13889\" y2=\"28.13889\"><\/line> <line fill=\"none\" id=\"svg_21\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"229.38072\" x2=\"229.38072\" y1=\"14.13889\" y2=\"28.13889\"><\/line> <\/g> <g id=\"svg_28\" stroke=\"null\"> <line fill=\"none\" id=\"svg_25\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"229.01308\" x2=\"270.27778\" y1=\"21.13889\" y2=\"21\"><\/line> <line fill=\"none\" id=\"svg_26\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"229.01308\" x2=\"229.01308\" y1=\"14.13889\" y2=\"28.13889\"><\/line> <line fill=\"none\" id=\"svg_27\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"269.38072\" x2=\"269.38072\" y1=\"14.13889\" y2=\"28.13889\"><\/line> <\/g> <g id=\"svg_32\" stroke=\"null\"> <line fill=\"none\" id=\"svg_29\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"270.01308\" x2=\"311.27778\" y1=\"21.13889\" y2=\"21\"><\/line> <line fill=\"none\" id=\"svg_30\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"270.01308\" x2=\"270.01308\" y1=\"14.13889\" y2=\"28.13889\"><\/line> <line fill=\"none\" id=\"svg_31\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"310.38072\" x2=\"310.38072\" y1=\"14.13889\" y2=\"28.13889\"><\/line> <\/g> <g id=\"svg_36\" stroke=\"null\"> <line fill=\"none\" id=\"svg_33\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"189.01308\" x2=\"230.27778\" y1=\"71.13889\" y2=\"71\"><\/line> <line fill=\"none\" id=\"svg_34\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"189.01308\" x2=\"189.01308\" y1=\"64.13889\" y2=\"78.13889\"><\/line> <line fill=\"none\" id=\"svg_35\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"229.38072\" x2=\"229.38072\" y1=\"64.13889\" y2=\"78.13889\"><\/line> <\/g> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"24\" id=\"svg_24\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"252.27778\" xml:space=\"preserve\" y=\"61.13889\">2 m<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_37\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(90 279.13327026367193,36.135276794433615) matrix(1,0,0,3.8204030998289795,0,-152.11380782560747) \" x=\"275.1368\" xml:space=\"preserve\" y=\"57.39181\">)<\/text> <\/g> <\/svg><\/span><\/p>Hi\u1ec7u s\u1ed1 ph\u1ea7n b\u1eb1ng nhau là: 5 – 3 = 2 (ph\u1ea7n).<\/p>Chi\u1ec1u dài c\u1ee7a bi\u1ec3n hi\u1ec7u là: 2 : 2 x 5 = 5 (m).<\/p>Chi\u1ec1u r\u1ed9ng c\u1ee7a bi\u1ec3n hi\u1ec7u là: 2 : 2 x 3 = 3 (m).<\/p>S\u1ed1 mét dây \u0111èn LED b\u1eb1ng chu vi c\u1ee7a bi\u1ec3n hi\u1ec7u: 2 x (5 + 3) = 16 (m).<\/p>Chi phí mua \u0111èn LED là: 16 x 60 000 = 960 000 (\u0111\u1ed3ng).<\/p>\u0110áp s\u1ed1: 960 000 \u0111\u1ed3ng.<\/strong><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-01-26 11:44:26","option_type":"txt","len":2}]}