Chú ý: Để đảm bảo quyền lợi và bảo vệ tài khoản của mình
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{"common":{"save":0,"post_id":"8413","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"4640","post_id":"8413","mon_id":"1159414","chapter_id":"1159497","question":"<p>M\u1ed9t b\u1ec3 n\u01b0\u1edbc có chi\u1ec1u dài 3 m, chi\u1ec1u r\u1ed9ng 2 m và chi\u1ec1u cao 1,5 m. N\u1ebfu m\u1ed7i gi\u1edd b\u01a1m vào b\u1ec3 2 m³ n\u01b0\u1edbc thì sau bao nhiêu gi\u1edd b\u1ec3 s\u1ebd \u0111\u1ea7y?<\/p>","options":["<strong>A.<\/strong> 2,5 gi\u1edd","<strong>B.<\/strong> 4 gi\u1edd","<strong>C.<\/strong> 3 gi\u1edd","<strong>D.<\/strong> 4,5 gi\u1edd"],"correct":"4","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 4,5 gi\u1edd.<\/span><\/p><p>Th\u1ec3 tích c\u1ee7a b\u1ec3 là 3 x 2 x 1,5 = 9 (m³).<\/p><p>N\u1ebfu m\u1ed7i gi\u1edd b\u01a1m \u0111\u01b0\u1ee3c 2 m³ n\u01b0\u1edbc thì b\u1ec3 \u0111\u1ea7y sau 9 : 2 = 4,5 (gi\u1edd).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-02-15 09:13:21","option_type":"txt","len":0},{"id":"4641","post_id":"8413","mon_id":"1159414","chapter_id":"1159497","question":"<p>M\u1ed9t b\u1ec3 n\u01b0\u1edbc có chi\u1ec1u dài 4 m, chi\u1ec1u r\u1ed9ng 3 m và chi\u1ec1u cao 2 m. Ban \u0111\u1ea7u b\u1ec3 ch\u1ee9a s\u1eb5n 4 m³. N\u1ebfu m\u1ed7i gi\u1edd b\u01a1m vào b\u1ec3 5 m³ n\u01b0\u1edbc thì sau bao lâu b\u1ec3 \u0111\u1ea7y?<\/p>","options":["<strong>A.<\/strong> 4 gi\u1edd","<strong>B.<\/strong> 4,5 gi\u1edd","<strong>C.<\/strong> 3,5 gi\u1edd","<strong>D.<\/strong> 5 gi\u1edd"],"correct":"1","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> 4 gi\u1edd.<\/span><\/p><p>Th\u1ec3 tích c\u1ee7a b\u1ec3 là 4 x 3 x 2 = 24 (m³).<\/p><p>L\u01b0\u1ee3ng n\u01b0\u1edbc c\u1ea7n b\u01a1m thêm vào \u0111\u1ec3 b\u1ec3 \u0111\u1ea7y là 24 – 4 = 20 (m³).<\/p><p>V\u1eady b\u1ec3 s\u1ebd \u0111\u1ea7y sau 20 : 5 = 4 (gi\u1edd).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-02-15 09:17:36","option_type":"txt","len":0},{"id":"4642","post_id":"8413","mon_id":"1159414","chapter_id":"1159497","question":"<p>Vi\u1ec7t t\u1ea1o m\u1ed9t kh\u1ed1i hình b\u1eb1ng cách ghép 6 hình h\u1ed9p ch\u1eef nh\u1eadt nh\u01b0 hình d\u01b0\u1edbi \u0111ây. Bi\u1ebft m\u1ed7i hình h\u1ed9p ch\u1eef nh\u1eadt có chi\u1ec1u dài 15 cm, chi\u1ec1u r\u1ed9ng 10 cm và chi\u1ec1u cao 3 cm. Hãy tính th\u1ec3 tích c\u1ee7a kh\u1ed1i hình \u0111ó.<\/p><p><span class=\"svgedit\"><svg height=\"200\" width=\"270\"> <g><title><\/title><rect fill=\"#aaaaff\" height=\"202\" 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><g id=\"svg_20\"> <line fill=\"none\" id=\"svg_2\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"4\" x1=\"82.66687\" x2=\"265.66687\" y1=\"4.33355\" y2=\"4.33355\"><\/line> <line fill=\"none\" id=\"svg_4\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"4\" x1=\"44.66722\" x2=\"227.66722\" y1=\"42.33321\" y2=\"42.33321\"><\/line> <line fill=\"none\" id=\"svg_5\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"4\" x1=\"6.0009\" x2=\"189.0009\" y1=\"81.66619\" y2=\"81.66619\"><\/line> <line fill=\"none\" id=\"svg_6\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"4\" x1=\"6.0009\" x2=\"189.0009\" y1=\"118.99919\" y2=\"118.99919\"><\/line> <line fill=\"none\" id=\"svg_7\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"4\" x1=\"6.0009\" x2=\"189.0009\" y1=\"155.66553\" y2=\"155.66553\"><\/line> <line fill=\"none\" id=\"svg_8\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"4\" x1=\"6.0009\" x2=\"189.0009\" y1=\"191.6652\" y2=\"191.6652\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_9\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"4\" x1=\"82.66772\" x2=\"6.00175\" y1=\"4.00131\" y2=\"82.00061\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_10\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"4\" x1=\"265.33275\" x2=\"188.66677\" y1=\"4.00131\" y2=\"82.00061\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_11\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"4\" x1=\"265.33275\" x2=\"188.66677\" y1=\"41.3343\" y2=\"119.33361\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_12\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"4\" x1=\"265.33275\" x2=\"188.66677\" y1=\"78.00064\" y2=\"155.99994\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_13\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"4\" x1=\"265.33275\" x2=\"188.66677\" y1=\"114.00032\" y2=\"191.99962\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_14\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"4\" x1=\"265.33276\" x2=\"265.33276\" y1=\"3.33465\" y2=\"114.00032\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_15\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"4\" x1=\"188.66678\" x2=\"188.66678\" y1=\"80.66728\" y2=\"191.33296\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_16\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"4\" x1=\"6.66842\" x2=\"6.66842\" y1=\"80.66728\" y2=\"191.33296\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_17\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"4\" x1=\"98.00092\" x2=\"98.00092\" y1=\"118.66695\" y2=\"155.33329\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_18\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"4\" x1=\"227.3331\" x2=\"227.3331\" y1=\"43.33429\" y2=\"80.00063\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_19\" stroke=\"#ffffaa\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"4\" x1=\"227.3331\" x2=\"227.3331\" y1=\"116.0003\" y2=\"152.66664\"><\/line> <\/g> <\/g> <\/svg><\/span><\/p>","options":["<strong>A.<\/strong> 150 cm³","<strong>B.<\/strong> 450 cm³","<strong>C.<\/strong> 1200 cm³","<strong>D.<\/strong> 2700 cm³"],"correct":"4","level":"3","hint":"<p>Tính chi\u1ec1u dài, chi\u1ec1u r\u1ed9ng và chi\u1ec1u cao c\u1ee7a kh\u1ed1i hình.<\/p><p>R\u1ed3i áp d\u1ee5ng công th\u1ee9c tính th\u1ec3 tích c\u1ee7a hình h\u1ed9p ch\u1eef nh\u1eadt.<\/p>","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 2700 cm³.<\/span><\/p><p>Th\u1ec3 tích c\u1ee7a m\u1ed7i hình h\u1ed9p ch\u1eef nh\u1eadt nh\u1ecf là: 15 × 10 × 3 = 450 (cm<sup>³<\/sup>).<\/p><p>Th\u1ec3 tích c\u1ee7a kh\u1ed1i hình \u0111ó là: 450 × 6 = 2700 (cm<sup>³<\/sup>).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-02-16 08:50:48","option_type":"txt","len":2}]}