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Home Lớp 5 Toán lớp 5 - Sách Kết nối tri thức Bài 44. Luyện tập chung về tỷ sốBài tập nâng cao

{"common":{"save":0,"post_id":"8383","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"4370","post_id":"8383","mon_id":"1159414","chapter_id":"1159495","question":"Bi\u1ebft ch\u1ecb h\u01a1n em 11 tu\u1ed5i. N\u0103m nay s\u1ed1 tu\u1ed5i c\u1ee7a ch\u1ecb b\u1eb1ng 2 l\u1ea7n s\u1ed1 tu\u1ed5i c\u1ee7a em. H\u1ecfi 5 n\u0103m n\u1eefa em bao nhiêu tu\u1ed5i?<\/p>","options":["A.<\/strong> 11 tu\u1ed5i","B.<\/strong> 22 tu\u1ed5i","C.<\/strong> 27 tu\u1ed5i","D.<\/strong> 16 tu\u1ed5i"],"correct":"4","level":"3","hint":"","answer":"Ch\u1ecdn D.<\/strong> 16 tu\u1ed5i.<\/span><\/p>Ta có s\u01a1 \u0111\u1ed3 <svg height=\"80\" width=\"200\"> <g><title><\/title><rect fill=\"#ffaaaa\" height=\"82\" id=\"canvas_background\" width=\"202\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_17\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"5\" xml:space=\"preserve\" y=\"26.25\">Ch\u1ecb<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"5\" xml:space=\"preserve\" y=\"69.25\">Em<\/text> <g id=\"svg_6\"> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"64\" x2=\"64\" y1=\"7.25\" y2=\"28.25\"><\/line> <line fill=\"none\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"64\" x2=\"115\" y1=\"18.25\" y2=\"18.25\"><\/line> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"115\" x2=\"115\" y1=\"7.25\" y2=\"28.25\"><\/line> <\/g> <g id=\"svg_10\"> <line fill=\"none\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"115\" x2=\"115\" y1=\"7.25\" y2=\"28.25\"><\/line> <line fill=\"none\" id=\"svg_8\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"115\" x2=\"166\" y1=\"18.25\" y2=\"18.25\"><\/line> <line fill=\"none\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"166\" x2=\"166\" y1=\"7.25\" y2=\"28.25\"><\/line> <\/g> <g id=\"svg_14\"> <line fill=\"none\" id=\"svg_11\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"64\" x2=\"64\" y1=\"50.25\" y2=\"71.25\"><\/line> <line fill=\"none\" id=\"svg_12\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"64\" x2=\"115\" y1=\"61.25\" y2=\"61.25\"><\/line> <line fill=\"none\" id=\"svg_13\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"115\" x2=\"115\" y1=\"50.25\" y2=\"71.25\"><\/line> <\/g> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_15\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(90 145.28479003906253,35.246215820312514) matrix(1.2144181728363035,0,0,2.2758385926073,-30.46547396550885,-54.19770171568225) \" x=\"140.72363\" xml:space=\"preserve\" y=\"47.79914\">)<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"20\" id=\"svg_16\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: text;\" text-anchor=\"start\" x=\"117\" xml:space=\"preserve\" y=\"61.25\">11 tu\u1ed5i<\/text> <\/g> <\/svg><\/span>.<\/p>Hi\u1ec7u s\u1ed1 ph\u1ea7n b\u1eb1ng nhau là 2 – 1 = 1 (ph\u1ea7n).<\/p>S\u1ed1 tu\u1ed5i c\u1ee7a em n\u0103m nay là 11 : 1 x 1 = 11 (tu\u1ed5i).<\/p>5 n\u0103m n\u1eefa s\u1ed1 tu\u1ed5i c\u1ee7a em là 11 + 5 = 16 (tu\u1ed5i).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-02-01 11:16:50","option_type":"txt","len":0},{"id":"4373","post_id":"8383","mon_id":"1159414","chapter_id":"1159495","question":"4 n\u0103m tr\u01b0\u1edbc s\u1ed1 tu\u1ed5i c\u1ee7a ông g\u1ea5p 5 l\u1ea7n s\u1ed1 tu\u1ed5i c\u1ee7a cháu. Bi\u1ebft ông h\u01a1n cháu 48 tu\u1ed5i. H\u1ecfi n\u0103m nay ông bao nhiêu tu\u1ed5i?<\/p>","options":["A.<\/strong> 64 tu\u1ed5i","B.<\/strong> 60 tu\u1ed5i","C.<\/strong> 48 tu\u1ed5i","D.<\/strong> 52 tu\u1ed5i"],"correct":"1","level":"3","hint":"","answer":"Ch\u1ecdn A.<\/strong> 64 tu\u1ed5i.<\/span><\/p>Ta có s\u01a1 \u0111\u1ed3 <svg height=\"80\" width=\"270\"> <g><title><\/title><rect fill=\"#aaffaa\" height=\"82\" id=\"canvas_background\" width=\"272\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"4\" xml:space=\"preserve\" y=\"27.25\">Ông<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"4\" xml:space=\"preserve\" y=\"64.25\">Cháu<\/text> <g id=\"svg_12\"> <line fill=\"none\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"76\" x2=\"76\" y1=\"44.25\" y2=\"67.25\"><\/line> <line fill=\"none\" id=\"svg_10\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"77\" x2=\"111\" y1=\"55.25\" y2=\"55.25\"><\/line> <line fill=\"none\" id=\"svg_11\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"112\" x2=\"112\" y1=\"44.25\" y2=\"67.25\"><\/line> <\/g> <g id=\"svg_16\"> <line fill=\"none\" id=\"svg_13\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"76\" x2=\"76\" y1=\"6.25\" y2=\"29.25\"><\/line> <line fill=\"none\" id=\"svg_14\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"77\" x2=\"111\" y1=\"17.25\" y2=\"17.25\"><\/line> <line fill=\"none\" id=\"svg_15\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"112\" x2=\"112\" y1=\"6.25\" y2=\"29.25\"><\/line> <\/g> <g id=\"svg_20\"> <line fill=\"none\" id=\"svg_17\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"112\" x2=\"112\" y1=\"6.25\" y2=\"29.25\"><\/line> <line fill=\"none\" id=\"svg_18\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"113\" x2=\"147\" y1=\"17.25\" y2=\"17.25\"><\/line> <line fill=\"none\" id=\"svg_19\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"148\" x2=\"148\" y1=\"6.25\" y2=\"29.25\"><\/line> <\/g> <g id=\"svg_24\"> <line fill=\"none\" id=\"svg_21\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"148\" x2=\"148\" y1=\"6.25\" y2=\"29.25\"><\/line> <line fill=\"none\" id=\"svg_22\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"149\" x2=\"183\" y1=\"17.25\" y2=\"17.25\"><\/line> <line fill=\"none\" id=\"svg_23\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"184\" x2=\"184\" y1=\"6.25\" y2=\"29.25\"><\/line> <\/g> <g id=\"svg_28\"> <line fill=\"none\" id=\"svg_25\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"184\" x2=\"184\" y1=\"6.25\" y2=\"29.25\"><\/line> <line fill=\"none\" id=\"svg_26\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"185\" x2=\"219\" y1=\"17.25\" y2=\"17.25\"><\/line> <line fill=\"none\" id=\"svg_27\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"220\" x2=\"220\" y1=\"6.25\" y2=\"29.25\"><\/line> <\/g> <g id=\"svg_32\"> <line fill=\"none\" id=\"svg_29\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"220\" x2=\"220\" y1=\"6.25\" y2=\"29.25\"><\/line> <line fill=\"none\" id=\"svg_30\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"221\" x2=\"255\" y1=\"17.25\" y2=\"17.25\"><\/line> <line fill=\"none\" id=\"svg_31\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"256\" x2=\"256\" y1=\"6.25\" y2=\"29.25\"><\/line> <\/g> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_33\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(90 197.86326599121094,37.74720382690432) matrix(1.428809762001037,0,0,6.455572382891984,-93.40852369634194,-278.7755390717931) \" x=\"199.85913\" xml:space=\"preserve\" y=\"57.37273\">)<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_34\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"149\" xml:space=\"preserve\" y=\"65.25\">48 tu\u1ed5i<\/text> <\/g> <\/svg><\/span>.<\/p>Hi\u1ec7u s\u1ed1 ph\u1ea7n b\u1eb1ng nhau là 5 – 1 = 4 (ph\u1ea7n).<\/p>S\u1ed1 tu\u1ed5i c\u1ee7a ông 4 n\u0103m tr\u01b0\u1edbc là 48 : 4 x 5 = 60 (tu\u1ed5i).<\/p>N\u0103m nay s\u1ed1 tu\u1ed5i c\u1ee7a ông là 60 + 4 = 64 (tu\u1ed5i).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-02-01 11:23:33","option_type":"txt","len":0},{"id":"4375","post_id":"8383","mon_id":"1159414","chapter_id":"1159495","question":"Trong m\u1ed9t thùng táo 40 kg thì có 2 kg táo b\u1ecb sâu, H\u1ecfi t\u1ec9 l\u1ec7 táo b\u1ecb sâu là bao nhiêu ph\u1ea7n tr\u0103m?<\/p>","options":["A.<\/strong> 0,05%","B.<\/strong> 0,5%","C.<\/strong> 5%","D.<\/strong> 0,005%"],"correct":"3","level":"3","hint":"","answer":"Ch\u1ecdn C.<\/strong> 5%.<\/span><\/p>T\u1ec9 l\u1ec7 ph\u1ea7n tr\u0103m táo b\u1ecb sâu là $\\dfrac{2}{40}=0,05=5\\%$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-02-01 11:26:30","option_type":"txt","len":0}]}