Phép nhân số thập phân

Home Lớp 5 Toán lớp 5 - Sách Kết nối tri thức Bài 21. Phép nhân số thập phânBài tập cơ bản

{"common":{"save":0,"post_id":"7673","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"1620","post_id":"7673","mon_id":"1159414","chapter_id":"1159449","question":"Ch\u1ecdn ph\u01b0\u01a1ng án \u0111úng \u0111i\u1ec1n vào ô tr\u1ed1ng:<\/p>“Mu\u1ed1n nhân m\u1ed9t s\u1ed1 th\u1eadp phân v\u1edbi m\u1ed9t s\u1ed1 t\u1ef1 nhiên ta làm nh\u01b0 sau: - \u0110\u1eb7t tính và th\u1ef1c hi\u1ec7n phép nhân nh\u01b0 nhân hai s\u1ed1 t\u1ef1 nhiên.  - \u0110\u1ebfm xem trong ph\u1ea7n th\u1eadp phân c\u1ee7a s\u1ed1 th\u1eadp phân có bao nhiêu ch\u1eef s\u1ed1 r\u1ed3i dùng d\u1ea5u ph\u1ea9y tách \u1edf tích ra b\u1ea5y nhiêu ch\u1eef s\u1ed1 k\u1ec3 t\u1eeb <input class=\"_tit_hoi\" disabled=\"disabled\" type=\"text\"\/>.”<\/span><\/p>","options":["A.<\/strong> trái sang ph\u1ea3i","B.<\/strong> ph\u1ea3i sang trái","C.<\/strong> trên xu\u1ed1ng d\u01b0\u1edbi ","D.<\/strong> d\u01b0\u1edbi lên trên"],"correct":"2","level":"1","hint":"","answer":"Ch\u1ecdn B.<\/strong> ph\u1ea3i sang trái.<\/span><\/p>Mu\u1ed1n nhân m\u1ed9t s\u1ed1 th\u1eadp phân v\u1edbi m\u1ed9t s\u1ed1 t\u1ef1 nhiên ta làm nh\u01b0 sau: - Nhân nh\u01b0 nhân các s\u1ed1 t\u1ef1 nhiên.  - \u0110\u1ebfm xem trong ph\u1ea7n th\u1eadp phân c\u1ee7a s\u1ed1 th\u1eadp phân có bao nhiêu ch\u1eef s\u1ed1 r\u1ed3i dùng d\u1ea5u ph\u1ea9y tách \u1edf tích ra b\u1ea5y nhiêu ch\u1eef s\u1ed1 k\u1ec3 t\u1eeb ph\u1ea3i sang trái.<\/span><\/strong><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-18 01:58:40","option_type":"txt","len":2},{"id":"1621","post_id":"7673","mon_id":"1159414","chapter_id":"1159449","question":"6,2 x 4 =…<\/p>","options":["A.<\/strong> 24,8","B.<\/strong> 2,48","C.<\/strong> 248","D.<\/strong> 24,08"],"correct":"1","level":"1","hint":"","answer":"Ch\u1ecdn A.<\/strong> 24,8.<\/span><\/p><svg height=\"130\" width=\"80\"> <g><title><\/title><rect fill=\"#d4ffaa\" height=\"132\" 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><text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"28\" xml:space=\"preserve\" y=\"25.25\">6,2<\/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=\"5\" xml:space=\"preserve\" y=\"51.25\">x<\/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=\"48\" xml:space=\"preserve\" y=\"74.25\">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=\"15\" xml:space=\"preserve\" y=\"117.25\">24,8<\/text> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"6\" x2=\"66\" y1=\"90.25\" y2=\"90.25\"><\/line> <\/g> <\/svg><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-18 02:00:20","option_type":"txt","len":0},{"id":"1624","post_id":"7673","mon_id":"1159414","chapter_id":"1159449","question":"2,4 x 15 =…<\/p>","options":["A.<\/strong> 360","B.<\/strong> 3,6","C.<\/strong> 3,06","D.<\/strong> 36"],"correct":"4","level":"1","hint":"","answer":"Ch\u1ecdn D.<\/strong> 36.<\/span><\/p><svg height=\"135\" width=\"90\"> <g><title><\/title><rect fill=\"#ffffaa\" height=\"137\" id=\"canvas_background\" width=\"92\" 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=\"29\" xml:space=\"preserve\" y=\"24.25\">2,4<\/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=\"1\" xml:space=\"preserve\" y=\"44.25\">x<\/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=\"36\" xml:space=\"preserve\" y=\"74.25\">15<\/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=\"16\" xml:space=\"preserve\" y=\"118.25\">36,0<\/text> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"5\" x2=\"68\" y1=\"88.25\" y2=\"88.25\"><\/line> <\/g> <\/svg><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-18 02:04:25","option_type":"txt","len":0}]}