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

Home Lớp 5 Toán lớp 5 - Sách Kết nối tri thức Bài 38. Tìm hai số khi biết tổng và tỉ số của hai số đóBài tập trung bình

{"common":{"save":0,"post_id":"8364","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"4168","post_id":"8364","mon_id":"1159414","chapter_id":"1159495","question":"Trên bãi c\u1ecf có 70 con bò s\u1eefa g\u1ed3m bò vàng và bò khoang, trong \u0111ó s\u1ed1 bò khoang b\u1eb1ng $\\dfrac{2}{5}$<\/span> s\u1ed1 bò vàng. H\u1ecfi trên bãi c\u1ecf có bao nhiêu con bò khoang, bao nhiêu con bò vàng?<\/p>","options":["A.<\/strong> 20 bò khoang, 50 bò vàng","B.<\/strong> 50 bò khoang, 20 bò vàng","C.<\/strong> 30 bò khoang, 40 bò vàng","D.<\/strong> 40 bò khoang, 30 bò vàng"],"correct":"1","level":"2","hint":"","answer":"Ch\u1ecdn A.<\/strong> 20 bò khoang, 50 bò vàng.<\/span><\/p>Ta có s\u01a1 \u0111\u1ed3 <svg height=\"100\" width=\"350\"> <g> <title><\/title> <rect fill=\"#d4ffaa\" height=\"102\" id=\"canvas_background\" width=\"352\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_6\" 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=\"18\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"4\" xml:space=\"preserve\" y=\"39.25\">Bò khoang<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"4\" xml:space=\"preserve\" y=\"73.25\">Bò vàng<\/text> <g id=\"svg_9\"> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"100\" x2=\"100\" y1=\"27.25\" y2=\"41\"><\/line> <line fill=\"none\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"131\" x2=\"131\" y1=\"27.25\" y2=\"41\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"101\" x2=\"131\" y1=\"34.25\" y2=\"34.25\"><\/line> <\/g> <g id=\"svg_13\"> <line fill=\"none\" id=\"svg_10\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"131\" x2=\"131\" y1=\"27.25\" y2=\"41\"><\/line> <line fill=\"none\" id=\"svg_11\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"162\" x2=\"162\" y1=\"27.25\" y2=\"41\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_12\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"132\" x2=\"162\" y1=\"34.25\" y2=\"34.25\"><\/line> <\/g> <g id=\"svg_17\"> <line fill=\"none\" id=\"svg_14\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"100\" x2=\"100\" y1=\"58.25\" y2=\"72\"><\/line> <line fill=\"none\" id=\"svg_15\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"131\" x2=\"131\" y1=\"58.25\" y2=\"72\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_16\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"101\" x2=\"131\" y1=\"65.25\" y2=\"65.25\"><\/line> <\/g> <g id=\"svg_21\"> <line fill=\"none\" id=\"svg_18\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"131\" x2=\"131\" y1=\"58.25\" y2=\"72\"><\/line> <line fill=\"none\" id=\"svg_19\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"162\" x2=\"162\" y1=\"58.25\" y2=\"72\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_20\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"132\" x2=\"162\" y1=\"65.25\" y2=\"65.25\"><\/line> <\/g> <g id=\"svg_25\"> <line fill=\"none\" id=\"svg_22\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"162\" x2=\"162\" y1=\"58.25\" y2=\"72\"><\/line> <line fill=\"none\" id=\"svg_23\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"193\" x2=\"193\" y1=\"58.25\" y2=\"72\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_24\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"163\" x2=\"193\" y1=\"65.25\" y2=\"65.25\"><\/line> <\/g> <g id=\"svg_29\"> <line fill=\"none\" id=\"svg_26\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"193\" x2=\"193\" y1=\"58.25\" y2=\"72\"><\/line> <line fill=\"none\" id=\"svg_27\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"224\" x2=\"224\" y1=\"58.25\" y2=\"72\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_28\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"194\" x2=\"224\" y1=\"65.25\" y2=\"65.25\"><\/line> <\/g> <g id=\"svg_33\"> <line fill=\"none\" id=\"svg_30\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"224\" x2=\"224\" y1=\"58.25\" y2=\"72\"><\/line> <line fill=\"none\" id=\"svg_31\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"255\" x2=\"255\" y1=\"58.25\" y2=\"72\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_32\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"225\" x2=\"255\" y1=\"65.25\" y2=\"65.25\"><\/line> <\/g> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_34\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1.7489999532699585,0,0,2.7200310230255127,-202.2299873828888,-15.260049176130906) \" x=\"268.42596\" xml:space=\"preserve\" y=\"28.19114\">}<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_35\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"284\" xml:space=\"preserve\" y=\"52.25\">70 con<\/text> <\/g> <\/svg><\/span>.<\/p>T\u1ed5ng s\u1ed1 ph\u1ea7n b\u1eb1ng nhau là 2 + 5 = 7 (ph\u1ea7n).<\/p>S\u1ed1 bò khoang là (70 : 7) x 2 = 20 (con).<\/p>S\u1ed1 bò vàng là 70 – 20 = 50 (con).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-01-26 10:40:31","option_type":"txt","len":2},{"id":"4171","post_id":"8364","mon_id":"1159414","chapter_id":"1159495","question":"S\u01a1 \u0111\u1ed3 sau cho bi\u1ebft \u0111i\u1ec1u gì?<\/p><svg height=\"100\" width=\"300\"> <g><title><\/title><rect fill=\"#ffd4aa\" height=\"102\" id=\"canvas_background\" width=\"302\" 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=\"18\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"2\" xml:space=\"preserve\" y=\"34.25\">Bút bi<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"2\" xml:space=\"preserve\" y=\"71.25\">Bút chì<\/text> <g id=\"svg_6\"> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"76\" x2=\"76\" y1=\"21.25\" y2=\"33.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"76\" x2=\"104\" y1=\"27.25\" y2=\"27.25\"><\/line> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"104\" x2=\"104\" y1=\"21.25\" y2=\"33.25\"><\/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=\"104\" x2=\"104\" y1=\"21.25\" y2=\"33.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_8\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"104\" x2=\"132\" y1=\"27.25\" y2=\"27.25\"><\/line> <line fill=\"none\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"132\" x2=\"132\" y1=\"21.25\" y2=\"33.25\"><\/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=\"132\" x2=\"132\" y1=\"21.25\" y2=\"33.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_12\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"132\" x2=\"160\" y1=\"27.25\" y2=\"27.25\"><\/line> <line fill=\"none\" id=\"svg_13\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"160\" x2=\"160\" y1=\"21.25\" y2=\"33.25\"><\/line> <\/g> <g id=\"svg_18\"> <line fill=\"none\" id=\"svg_15\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"160\" x2=\"160\" y1=\"21.25\" y2=\"33.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_16\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"160\" x2=\"188\" y1=\"27.25\" y2=\"27.25\"><\/line> <line fill=\"none\" id=\"svg_17\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"188\" x2=\"188\" y1=\"21.25\" y2=\"33.25\"><\/line> <\/g> <g id=\"svg_22\"> <line fill=\"none\" id=\"svg_19\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"76\" x2=\"76\" y1=\"57.25\" y2=\"69.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_20\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"76\" x2=\"104\" y1=\"63.25\" y2=\"63.25\"><\/line> <line fill=\"none\" id=\"svg_21\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"104\" x2=\"104\" y1=\"57.25\" y2=\"69.25\"><\/line> <\/g> <g id=\"svg_26\"> <line fill=\"none\" id=\"svg_23\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"104\" x2=\"104\" y1=\"57.25\" y2=\"69.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_24\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"104\" x2=\"132\" y1=\"63.25\" y2=\"63.25\"><\/line> <line fill=\"none\" id=\"svg_25\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"132\" x2=\"132\" y1=\"57.25\" y2=\"69.25\"><\/line> <\/g> <g id=\"svg_30\"> <line fill=\"none\" id=\"svg_27\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"132\" x2=\"132\" y1=\"57.25\" y2=\"69.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_28\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"132\" x2=\"160\" y1=\"63.25\" y2=\"63.25\"><\/line> <line fill=\"none\" id=\"svg_29\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"160\" x2=\"160\" y1=\"57.25\" y2=\"69.25\"><\/line> <\/g> <g id=\"svg_34\"> <line fill=\"none\" id=\"svg_31\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"160\" x2=\"160\" y1=\"57.25\" y2=\"69.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_32\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"160\" x2=\"188\" y1=\"63.25\" y2=\"63.25\"><\/line> <line fill=\"none\" id=\"svg_33\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"188\" x2=\"188\" y1=\"57.25\" y2=\"69.25\"><\/line> <\/g> <g id=\"svg_38\"> <line fill=\"none\" id=\"svg_35\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"188\" x2=\"188\" y1=\"57.25\" y2=\"69.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_36\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"188\" x2=\"216\" y1=\"63.25\" y2=\"63.25\"><\/line> <line fill=\"none\" id=\"svg_37\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"216\" x2=\"216\" y1=\"57.25\" y2=\"69.25\"><\/line> <\/g> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_39\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1.4161063432693481,0,0,2.7199602127075195,-94.0400399281516,-37.6177489564634) \" x=\"228.29384\" xml:space=\"preserve\" y=\"34.57348\">}<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_40\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"244\" xml:space=\"preserve\" y=\"49.25\">81 bút<\/text> <\/g> <\/svg><\/span><\/p>","options":["A.<\/strong> S\u1ed1 bút bi b\u1eb1ng $\\dfrac{3}{4}$<\/span> s\u1ed1 bút chì.","B.<\/strong> S\u1ed1 bút bi b\u1eb1ng $\\dfrac{4}{5}$<\/span> s\u1ed1 bút chì.","C.<\/strong> S\u1ed1 bút bi b\u1eb1ng $\\dfrac{5}{4}$<\/span> s\u1ed1 bút chì.","D.<\/strong> S\u1ed1 bút bi b\u1eb1ng $\\dfrac{5}{3}$<\/span> s\u1ed1 bút chì."],"correct":"2","level":"2","hint":"Nhìn vào s\u01a1 \u0111\u1ed3 ta th\u1ea5y s\u1ed1 bút bi có 4 ph\u1ea7n, s\u1ed1 bút chì có 5 ph\u1ea7n.<\/p>","answer":"Ch\u1ecdn B.<\/strong> S\u1ed1 bút bi b\u1eb1ng $\\dfrac{4}{5}$<\/span> s\u1ed1 bút chì.<\/span><\/p>D\u1ef1a vào s\u01a1 \u0111\u1ed3 ta th\u1ea5y s\u1ed1 bút bi có 4 ph\u1ea7n, s\u1ed1 bút chì có 5 ph\u1ea7n nên s\u1ed1 bút bi b\u1eb1ng $\\dfrac{4}{5}$<\/span> s\u1ed1 bút chì.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-01-26 10:47:26","option_type":"math","len":0},{"id":"4173","post_id":"8364","mon_id":"1159414","chapter_id":"1159495","question":"K\u1ebft lu\u1eadn nào là \u0111úng v\u1edbi s\u01a1 \u0111\u1ed3 sau?<\/p><svg height=\"100\" width=\"300\"> <g><title><\/title><rect fill=\"#ffd4aa\" height=\"102\" id=\"canvas_background\" width=\"302\" 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=\"18\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"2\" xml:space=\"preserve\" y=\"34.25\">Bút bi<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"2\" xml:space=\"preserve\" y=\"71.25\">Bút chì<\/text> <g id=\"svg_6\"> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"76\" x2=\"76\" y1=\"21.25\" y2=\"33.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"76\" x2=\"104\" y1=\"27.25\" y2=\"27.25\"><\/line> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"104\" x2=\"104\" y1=\"21.25\" y2=\"33.25\"><\/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=\"104\" x2=\"104\" y1=\"21.25\" y2=\"33.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_8\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"104\" x2=\"132\" y1=\"27.25\" y2=\"27.25\"><\/line> <line fill=\"none\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"132\" x2=\"132\" y1=\"21.25\" y2=\"33.25\"><\/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=\"132\" x2=\"132\" y1=\"21.25\" y2=\"33.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_12\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"132\" x2=\"160\" y1=\"27.25\" y2=\"27.25\"><\/line> <line fill=\"none\" id=\"svg_13\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"160\" x2=\"160\" y1=\"21.25\" y2=\"33.25\"><\/line> <\/g> <g id=\"svg_18\"> <line fill=\"none\" id=\"svg_15\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"160\" x2=\"160\" y1=\"21.25\" y2=\"33.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_16\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"160\" x2=\"188\" y1=\"27.25\" y2=\"27.25\"><\/line> <line fill=\"none\" id=\"svg_17\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"188\" x2=\"188\" y1=\"21.25\" y2=\"33.25\"><\/line> <\/g> <g id=\"svg_22\"> <line fill=\"none\" id=\"svg_19\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"76\" x2=\"76\" y1=\"57.25\" y2=\"69.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_20\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"76\" x2=\"104\" y1=\"63.25\" y2=\"63.25\"><\/line> <line fill=\"none\" id=\"svg_21\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"104\" x2=\"104\" y1=\"57.25\" y2=\"69.25\"><\/line> <\/g> <g id=\"svg_26\"> <line fill=\"none\" id=\"svg_23\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"104\" x2=\"104\" y1=\"57.25\" y2=\"69.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_24\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"104\" x2=\"132\" y1=\"63.25\" y2=\"63.25\"><\/line> <line fill=\"none\" id=\"svg_25\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"132\" x2=\"132\" y1=\"57.25\" y2=\"69.25\"><\/line> <\/g> <g id=\"svg_30\"> <line fill=\"none\" id=\"svg_27\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"132\" x2=\"132\" y1=\"57.25\" y2=\"69.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_28\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"132\" x2=\"160\" y1=\"63.25\" y2=\"63.25\"><\/line> <line fill=\"none\" id=\"svg_29\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"160\" x2=\"160\" y1=\"57.25\" y2=\"69.25\"><\/line> <\/g> <g id=\"svg_34\"> <line fill=\"none\" id=\"svg_31\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"160\" x2=\"160\" y1=\"57.25\" y2=\"69.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_32\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"160\" x2=\"188\" y1=\"63.25\" y2=\"63.25\"><\/line> <line fill=\"none\" id=\"svg_33\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"188\" x2=\"188\" y1=\"57.25\" y2=\"69.25\"><\/line> <\/g> <g id=\"svg_38\"> <line fill=\"none\" id=\"svg_35\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"188\" x2=\"188\" y1=\"57.25\" y2=\"69.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_36\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"188\" x2=\"216\" y1=\"63.25\" y2=\"63.25\"><\/line> <line fill=\"none\" id=\"svg_37\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"216\" x2=\"216\" y1=\"57.25\" y2=\"69.25\"><\/line> <\/g> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_39\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(1.4161063432693481,0,0,2.7199602127075195,-94.0400399281516,-37.6177489564634) \" x=\"228.29384\" xml:space=\"preserve\" y=\"34.57348\">}<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_40\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"244\" xml:space=\"preserve\" y=\"49.25\">81 bút<\/text> <\/g> <\/svg><\/span><\/p>","options":["A.<\/strong> 30 bút bi, 51 bút chì.","B.<\/strong> 40 bút bi, 41 bút chì.","C.<\/strong> 36 bút bi, 45 bút chì.","D.<\/strong> 34 bút bi, 47 bút chì"],"correct":"3","level":"2","hint":"Nhìn vào s\u01a1 \u0111\u1ed3 ta th\u1ea5y s\u1ed1 bút bi có 4 ph\u1ea7n, s\u1ed1 bút chì có 5 ph\u1ea7n.<\/p>T\u1ed5ng s\u1ed1 ph\u1ea7n b\u1eb1ng nhau là 4 + 5 = 9 (ph\u1ea7n)<\/p>","answer":"Ch\u1ecdn C.<\/strong> 36 bút bi, 45 bút chì.<\/span><\/p>Nhìn vào s\u01a1 \u0111\u1ed3 ta th\u1ea5y s\u1ed1 bút bi có 4 ph\u1ea7n, s\u1ed1 bút chì có 5 ph\u1ea7n.<\/p>T\u1ed5ng s\u1ed1 ph\u1ea7n b\u1eb1ng nhau c\u1ee7a bút bi và bút chì là 4 + 5 = 9 (ph\u1ea7n).<\/p>S\u1ed1 bút bi là (81 : 9) x 4 = 36 (bút).<\/p>S\u1ed1 bút chì là 81 – 36 = 45 (bút).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-01-26 10:52:36","option_type":"txt","len":2}]}