Ôn tập các phép tính với số thập phân

Home Lớp 5 Toán lớp 5 - Sách Kết nối tri thức Bài 31. Ôn tập các phép tính với số thập phânBài tập nâng cao

{"common":{"save":0,"post_id":"7717","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"1963","post_id":"7717","mon_id":"1159414","chapter_id":"1159461","question":"M\u1ed9t can có th\u1ec3 \u0111\u1ef1ng \u0111\u01b0\u1ee3c $20\\dfrac{3}{5}$<\/span> lít n\u01b0\u1edbc. Hi\u1ec7n t\u1ea1i trong can có $6\\dfrac{1}{4}$<\/span> lít n\u01b0\u1edbc. H\u1ecfi ph\u1ea3i \u0111\u1ed5 thêm bao nhiêu lít n\u01b0\u1edbc n\u1eefa thì \u0111\u1ea7y can?<\/p>","options":["A.<\/strong> 14,25 lít","B.<\/strong> 14,5 lít","C.<\/strong> 14,45 lít","D.<\/strong> 14,35 lít"],"correct":"4","level":"3","hint":"","answer":"Ch\u1ecdn D.<\/strong> 14,35 lít.<\/span><\/p>$20\\dfrac{3}{5}=20,6$<\/span> ; $6\\dfrac{1}{4}=6,25$<\/span>.<\/p>C\u1ea7n ph\u1ea3i \u0111\u1ed5 thêm s\u1ed1 lít n\u01b0\u1edbc \u0111\u1ec3 \u0111\u1ea7y can là: 20,6 – 6,25 = 14,35 (lít).<\/p><svg height=\"120\" width=\"100\"> <g><title><\/title><rect fill=\"#fcdbfc\" height=\"122\" id=\"canvas_background\" width=\"102\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_1\" 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_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"28.86363\" xml:space=\"preserve\" y=\"28.52272\">20,60<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"41.86363\" xml:space=\"preserve\" y=\"65.52272\">6,25<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"28.86363\" xml:space=\"preserve\" y=\"105.52272\">14,35<\/text> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"5.86363\" x2=\"17.86363\" y1=\"43.52272\" y2=\"43.52272\"><\/line> <line fill=\"none\" id=\"svg_6\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"13.86363\" x2=\"94.86363\" y1=\"76.52272\" y2=\"76.52272\"><\/line> <\/g> <\/svg><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-25 02:24:39","option_type":"txt","len":2},{"id":"1965","post_id":"7717","mon_id":"1159414","chapter_id":"1159461","question":"Lan cân n\u1eb7ng 45kg. Minh cân n\u1eb7ng 51,6 kg. \u1ede trên M\u1eb7t Tr\u0103ng m\u1ecdi v\u1eadt \u0111\u1ec1u nh\u1eb9 h\u01a1n \u1edf trên Trái \u0110\u1ea5t 6 l\u1ea7n. H\u1ecfi trên m\u1eb7t tr\u0103ng, c\u1ea3 hai b\u1ea1n cân n\u1eb7ng bao nhiêu kg?<\/p>","options":["A.<\/strong> 15,1 kg","B.<\/strong> 15 kg","C.<\/strong> 16,1 kg","D.<\/strong> 16 kg"],"correct":"3","level":"3","hint":"","answer":"Ch\u1ecdn C.<\/strong> 16,1 kg.<\/span><\/p>Trên m\u1eb7t tr\u0103ng, s\u1ed1 cân n\u1eb7ng c\u1ee7a Lan là: 45 : 6 = 7,5 (kg).<\/p>Trên m\u1eb7t tr\u0103ng, s\u1ed1 cân n\u1eb7ng c\u1ee7a Minh là: 51,6 : 6 = 8,6 (kg).<\/p>Trên m\u1eb7t tr\u0103ng, s\u1ed1 cân n\u1eb7ng c\u1ee7a c\u1ea3 hai b\u1ea1n là: 7,5 + 8,6 = 16,1 (kg).<\/p><svg height=\"120\" width=\"120\"> <g><title><\/title><rect fill=\"#ffffaa\" height=\"122\" id=\"canvas_background\" width=\"122\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_1\" 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_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"6.86363\" xml:space=\"preserve\" y=\"27.52272\">45<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"77.86363\" xml:space=\"preserve\" y=\"25.52272\">6<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"66.86363\" xml:space=\"preserve\" y=\"56.52272\">7,5<\/text> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"56\" x2=\"55.86363\" y1=\"3.52272\" y2=\"66.52272\"><\/line> <line fill=\"none\" id=\"svg_6\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"114.86362\" x2=\"55.86363\" y1=\"30.52272\" y2=\"30.52272\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_7\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"20.86363\" xml:space=\"preserve\" y=\"59.52272\">30<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_8\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"33.86363\" xml:space=\"preserve\" y=\"93.52272\">0<\/text> <\/g> <\/svg><\/span>   <svg height=\"120\" width=\"130\"> <g><title><\/title><rect fill=\"#aad4ff\" height=\"122\" id=\"canvas_background\" width=\"132\" 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><line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"70.86363\" x2=\"70.86363\" y1=\"5.52272\" y2=\"68.52272\"><\/line> <line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"127.86363\" x2=\"69.86363\" y1=\"38\" y2=\"38\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"7.86363\" xml:space=\"preserve\" y=\"29.52272\">51,6<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"89.86363\" xml:space=\"preserve\" y=\"27.52272\">6<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"77.86363\" xml:space=\"preserve\" y=\"63.52272\">8,6<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_6\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"20.86363\" xml:space=\"preserve\" y=\"65.52272\">3 6<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_7\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"40.86363\" xml:space=\"preserve\" y=\"99.52272\">0<\/text> <\/g> <\/svg><\/span>   <svg height=\"120\" width=\"80\"> <g><title><\/title><rect fill=\"#f7dcf7\" height=\"122\" id=\"canvas_background\" width=\"82\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_1\" 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_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"32.86363\" xml:space=\"preserve\" y=\"25.52272\">7,5<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"32.86363\" xml:space=\"preserve\" y=\"63.52272\">8,6<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"18.86363\" xml:space=\"preserve\" y=\"104.52272\">16,1<\/text> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"10.86363\" x2=\"68.86363\" y1=\"78.52272\" y2=\"78.52272\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_6\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"8.86363\" xml:space=\"preserve\" y=\"43.52272\">+<\/text> <\/g> <\/svg><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-25 02:27:21","option_type":"txt","len":0},{"id":"1967","post_id":"7717","mon_id":"1159414","chapter_id":"1159461","question":"M\u1ed9t hình ch\u1eef nh\u1eadt có chi\u1ec1u dài 2,45m và chi\u1ec1u r\u1ed9ng 0,8m. Chu vi c\u1ee7a hình vuông có cùng di\u1ec7n tích v\u1edbi hình ch\u1eef nh\u1eadt \u0111ó là:<\/p>","options":["A.<\/strong> 5,6 m","B.<\/strong> 4,6 m","C.<\/strong> 1,4 m","D.<\/strong> 1,96 m"],"correct":"1","level":"3","hint":"","answer":"Ch\u1ecdn A.<\/strong> 5,6 m.<\/span><\/p>Di\u1ec7n tích c\u1ee7a hình ch\u1eef nh\u1eadt là: 2,45 x 0,8 = 1,96 (m²).<\/p>Di\u1ec7n tích hình vuông b\u1eb1ng di\u1ec7n tích hình ch\u1eef nh\u1eadt nên di\u1ec7n tích hình vuông là 1,96 m².<\/p>L\u1ea1i có 1,96 = 1,4 x 1,4 nên \u0111\u1ed9 dài c\u1ea1nh hình vuông là 1,4 m.<\/p>Chu vi c\u1ee7a hình vuông là: 1,4 x 4 = 5,6 (m).<\/p><svg height=\"150\" width=\"120\"> <g><title><\/title><rect fill=\"#f7cfaa\" height=\"152\" id=\"canvas_background\" width=\"122\" 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=\"49.86363\" xml:space=\"preserve\" y=\"24.52272\">2,45<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"62.86363\" xml:space=\"preserve\" y=\"51.52272\">0,8<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"36.86363\" xml:space=\"preserve\" y=\"86.52272\">1 960<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"36.86363\" xml:space=\"preserve\" y=\"111.52272\">0 00<\/text> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"20.86363\" x2=\"102.86363\" y1=\"60.52272\" y2=\"60.52272\"><\/line> <line fill=\"none\" id=\"svg_6\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"20.86363\" x2=\"102.86363\" y1=\"116.52272\" y2=\"116.52272\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_7\" stroke=\"#000\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" x=\"35.86363\" xml:space=\"preserve\" y=\"140.52272\">1,960<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_8\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"29.86363\" xml:space=\"preserve\" y=\"40.52272\">x<\/text> <\/g> <\/svg><\/span>   <svg height=\"160\" width=\"80\"> <g><title><\/title><rect fill=\"#aaffd4\" height=\"162\" id=\"canvas_background\" width=\"82\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_9\" 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=\"25.86363\" xml:space=\"preserve\" y=\"26.52272\">1,4<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"25.86363\" xml:space=\"preserve\" y=\"57.52272\">1,4<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"30.86363\" xml:space=\"preserve\" y=\"92.52272\">56<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"10.86363\" xml:space=\"preserve\" y=\"119.52272\">1 4<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"8.86363\" xml:space=\"preserve\" y=\"154.52272\">1,96<\/text> <line fill=\"none\" id=\"svg_6\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"2.86363\" x2=\"61.86363\" y1=\"66.52272\" y2=\"66.52272\"><\/line> <line fill=\"none\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"1.86363\" x2=\"63.86363\" y1=\"124.52272\" y2=\"124.52272\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_8\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"11.86363\" xml:space=\"preserve\" y=\"40.52272\">x<\/text> <\/g> <\/svg><\/span>   <svg height=\"120\" width=\"80\"> <g><title><\/title><rect fill=\"#aad4ff\" height=\"122\" id=\"canvas_background\" width=\"82\" 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><line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"12.86363\" x2=\"74.86363\" y1=\"69.52272\" y2=\"69.52272\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"31.86363\" xml:space=\"preserve\" y=\"27.52272\">1,4<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"49.86363\" xml:space=\"preserve\" y=\"63.52272\">4<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"31.86363\" xml:space=\"preserve\" y=\"94.52272\">5,6<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"17.86363\" xml:space=\"preserve\" y=\"44.52272\">x<\/text> <\/g> <\/svg><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-25 02:29:48","option_type":"txt","len":0}]}