Ôn tập tỉ số, tỉ số phần trăm-Bài tập nâng cao

Home Lớp 5 Toán lớp 5 - Sách Kết nối tri thức Bài 70. Ôn tập tỉ số, tỉ số phần trămBài tập nâng cao

{"common":{"save":0,"post_id":"9112","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5150","post_id":"9112","mon_id":"1159414","chapter_id":"1159500","question":"\u0110i\u1ec1n các s\u1ed1 thích h\u1ee3p vào ô tr\u1ed1ng d\u1ef1a trên bài toán sau \u0111ây:<\/p>Theo k\u1ebf ho\u1ea1ch, trong th\u1eddi gian quy \u0111\u1ecbnh thì x\u01b0\u1edfng may ph\u1ea3i may \u0111\u01b0\u1ee3c 1000 b\u1ed9 qu\u1ea7n áo. \u0110\u1ebfn n\u1eeda th\u1eddi gian \u0111ó, x\u01b0\u1edfng may \u0111ã may \u0111\u01b0\u1ee3c 650 b\u1ed9 qu\u1ea7n áo và \u0111\u1ebfn h\u1ebft th\u1eddi gian quy \u0111\u1ecbnh, x\u01b0\u1edfng may \u0111ã may \u0111\u01b0\u1ee3c t\u1ea5t c\u1ea3 1250 b\u1ed9 qu\u1ea7n áo.<\/strong><\/p>a) \u0110\u1ebfn h\u1ebft n\u1eeda th\u1eddi gian quy \u0111\u1ecbnh, x\u01b0\u1edfng may \u0111ã th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/>% k\u1ebf ho\u1ea1ch.<\/p>b) \u0110\u1ebfn h\u1ebft th\u1eddi gian quy \u0111\u1ecbnh, x\u01b0\u1edfng may \u0111ã v\u01b0\u1ee3t k\u1ebf ho\u1ea1ch <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/>%.<\/p>","options":"","correct":["[\"65\",\"25\"]"],"level":"3","hint":"","answer":"Các s\u1ed1 c\u1ea7n \u0111i\u1ec1n t\u1eeb trên xu\u1ed1ng d\u01b0\u1edbi l\u1ea7n l\u01b0\u1ee3t là 65 <\/strong><\/span>và 25<\/strong><\/span>.<\/p>a) \u0110\u1ebfn h\u1ebft n\u1eeda th\u1eddi gian quy \u0111\u1ecbnh, x\u01b0\u1edfng may \u0111ã th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c s\u1ed1 ph\u1ea7n tr\u0103m k\u1ebf ho\u1ea1ch là<\/p>650 : 1000 = 65 : 100 = 65<\/strong><\/span>%.<\/p>b) \u0110\u1ebfn h\u1ebft th\u1eddi gian quy \u0111\u1ecbnh, x\u01b0\u1edfng may \u0111ã v\u01b0\u1ee3t k\u1ebf ho\u1ea1ch s\u1ed1 b\u1ed9 qu\u1ea7n áo là<\/p>1250 – 1000 = 250 (b\u1ed9).<\/p>\u0110\u1ebfn h\u1ebft th\u1eddi gian quy \u0111\u1ecbnh, x\u01b0\u1edfng may \u0111ã v\u01b0\u1ee3t k\u1ebf ho\u1ea1ch s\u1ed1 ph\u1ea7n tr\u0103m là<\/p>250 : 1000 = 25 : 100 = 25<\/strong><\/span>%.<\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"0","date":"2025-04-30 16:15:10"},{"id":"5153","post_id":"9112","mon_id":"1159414","chapter_id":"1159500","question":"H\u01b0\u1edfng \u1ee9ng phong trào tr\u1ed3ng cây ph\u1ee7 xanh \u0111\u1ed3i tr\u1ecdc, l\u1edbp 5A và l\u1edbp 5B tr\u1ed3ng \u0111\u01b0\u1ee3c 250 cây. Bi\u1ebft s\u1ed1 cây l\u1edbp 5A tr\u1ed3ng \u0111\u01b0\u1ee3c b\u1eb1ng $\\dfrac{2}{3}$<\/span> s\u1ed1 cây l\u1edbp 5B tr\u1ed3ng \u0111\u01b0\u1ee3c. H\u1ecfi l\u1edbp 5A tr\u1ed3ng \u0111\u01b0\u1ee3c ít h\u01a1n l\u1edbp 5B bao nhiêu cây?<\/p>","options":["A.<\/strong> 50 cây","B.<\/strong> 100 cây","C.<\/strong> 150 cây","D.<\/strong> 200 cây"],"correct":"1","level":"3","hint":"","answer":"Ch\u1ecdn A.<\/strong> 50 cây.<\/span><\/p><svg height=\"70\" width=\"250\"> <g><title><\/title><rect fill=\"#aaffaa\" height=\"72\" id=\"canvas_background\" width=\"252\" 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=\"5\" xml:space=\"preserve\" y=\"25.25\">5A<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"5\" xml:space=\"preserve\" y=\"59.25\">5B<\/text> <g id=\"svg_6\"> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"49\" x2=\"49\" y1=\"10.25\" y2=\"25.25\"><\/line> <line fill=\"none\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"83\" x2=\"83\" y1=\"10.25\" y2=\"25.25\"><\/line> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"49\" x2=\"83\" y1=\"17.25\" y2=\"17.25\"><\/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=\"83\" x2=\"83\" y1=\"10.25\" y2=\"25.25\"><\/line> <line fill=\"none\" id=\"svg_8\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"117\" x2=\"117\" y1=\"10.25\" y2=\"25.25\"><\/line> <line fill=\"none\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"83\" x2=\"117\" y1=\"17.25\" y2=\"17.25\"><\/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=\"49\" x2=\"49\" y1=\"43.25\" y2=\"58.25\"><\/line> <line fill=\"none\" id=\"svg_12\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"83\" x2=\"83\" y1=\"43.25\" y2=\"58.25\"><\/line> <line fill=\"none\" id=\"svg_13\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"49\" x2=\"83\" y1=\"50.25\" y2=\"50.25\"><\/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=\"83\" x2=\"83\" y1=\"43.25\" y2=\"58.25\"><\/line> <line fill=\"none\" id=\"svg_16\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"117\" x2=\"117\" y1=\"43.25\" y2=\"58.25\"><\/line> <line fill=\"none\" id=\"svg_17\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"83\" x2=\"117\" y1=\"50.25\" y2=\"50.25\"><\/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=\"117\" x2=\"117\" y1=\"43.25\" y2=\"58.25\"><\/line> <line fill=\"none\" id=\"svg_20\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"151\" x2=\"151\" y1=\"43.25\" y2=\"58.25\"><\/line> <line fill=\"none\" id=\"svg_21\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"117\" x2=\"151\" y1=\"50.25\" y2=\"50.25\"><\/line> <\/g> <path d=\"m166.10749,12.70947c0,-5.36506 -0.83628,-8.67229 -3.94247,-9.33374l0.07965,-0.14699c4.49999,0.14699 5.73451,2.64578 5.73451,10.65663l0,11.09759c0,4.9241 0.27876,7.2759 3.18584,8.5988l0,0.14699c-2.86725,1.32289 -3.18584,3.6747 -3.18584,8.5253l0,11.83253c0,7.71687 -1.5531,9.92169 -5.73451,10.14217l-0.07965,-0.14662c3.18584,-0.88193 3.94247,-3.82169 3.94247,-9.4076l0,-11.83253c0,-4.99759 0.35841,-7.86386 3.34513,-9.11325l0,-0.14699c-3.02654,-1.32289 -3.34513,-4.40964 -3.34513,-9.40723l0,-11.46506z\" fill=\"#000000\" id=\"svg_23\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" id=\"svg_24\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"182\" xml:space=\"preserve\" y=\"44.25\">250 cây<\/text> <\/g> <\/svg><\/span><\/p>T\u1ed5ng s\u1ed1 ph\u1ea7n b\u1eb1ng nhau là 2 + 3 = 5 (ph\u1ea7n).<\/p>S\u1ed1 cây l\u1edbp 5A tr\u1ed3ng \u0111\u01b0\u1ee3c là 250 : 5 x 2 = 100 (cây).<\/p>S\u1ed1 cây l\u1edbp 5B tr\u1ed3ng \u0111\u01b0\u1ee3c là 250 – 100 = 150 (cây).<\/p>L\u1edbp 5A tr\u1ed3ng \u0111\u01b0\u1ee3c ít h\u01a1n l\u1edbp 5B s\u1ed1 cây là 150 – 100 = 50 (cây).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-04-30 16:26:12","option_type":"txt","len":2},{"id":"5154","post_id":"9112","mon_id":"1159414","chapter_id":"1159500","question":"Trên b\u1ea3n \u0111\u1ed3 t\u1ec9 l\u1ec7 1 : 5000, khu \u0111\u1ea5t xây d\u1ef1ng nhà máy s\u1ea3n xu\u1ea5t \u0111\u1ed3 ch\u01a1i tr\u1ebb em là hình ch\u1eef nh\u1eadt có chi\u1ec1u dài 6 cm, chi\u1ec1u r\u1ed9ng 4 cm. Di\u1ec7n tích c\u1ee7a khu \u0111\u1ea5t \u0111ó trên th\u1ef1c t\u1ebf là bao nhiêu hecta? Bi\u1ebft 1 hecta = 1 hm².<\/p>","options":["A.<\/strong> 60 hecta","B.<\/strong> 6 hecta","C.<\/strong> 600 hecta","D.<\/strong> 6000 hecta"],"correct":"2","level":"3","hint":"","answer":"Ch\u1ecdn B.<\/strong> 6 hecta.<\/span><\/p>Chi\u1ec1u dài c\u1ee7a khu \u0111\u1ea5t là 6 x 5000 = 30 000 (cm) = 3 (hm).<\/p>Chi\u1ec1u r\u1ed9ng c\u1ee7a khu \u0111\u1ea5t là 4 x 5000 = 20 000 (cm) = 2 (hm).<\/p>Di\u1ec7n tích c\u1ee7a khu \u0111\u1ea5t trên th\u1ef1c t\u1ebf là 3 x 2 = 6 (hm²) = 6 hecta.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-04-30 16:32:35","option_type":"txt","len":1}]}