Số thập phân - Bài tập nâng cao

Home Lớp 6 Toán lớp 6 - Sách kết nối tri thức Bài 28: Số thập phânBài tập nâng cao

{"common":{"save":0,"post_id":"4601","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6772","post_id":"4601","mon_id":"1158113","chapter_id":"1158126","question":"Cho b\u1ea3ng th\u1ed1ng kê % thay \u0111\u1ed5i trong dân s\u1ed1 Nh\u1eadt B\u1ea3n qua m\u1ed9t s\u1ed1 n\u0103m (Ngu\u1ed3n: DanSo.org)<\/p><table border=\"1\" cellpadding=\"1\" cellspacing=\"1\" style=\"height: 50px; width: 350px;\"><tbody> <tr> <td>N\u0103m<\/td> <td>% thay \u0111\u1ed5i<\/td> <\/tr> <tr> <td>1955<\/td> <td>1,46<\/td> <\/tr> <tr> <td>1960<\/td> <td>1,02<\/td> <\/tr> <tr> <td>1965<\/td> <td>1,00<\/td> <\/tr> <tr> <td>1970<\/td> <td>1,28<\/td> <\/tr> <tr> <td>1975<\/td> <td>1,39<\/td> <\/tr><\/tbody><\/table>Nh\u1eefng n\u0103m nào có % thay \u0111\u1ed5i nh\u1ecf h\u01a1n 1,3 <\/strong>?<\/p>","options":["1955","1970","1975","1965","1960"],"correct":"[\"2\",\"4\",\"5\"]","level":"3","hint":"So sánh % thay \u0111\u1ed5i c\u1ee7a m\u1ed7i n\u0103m v\u1edbi s\u1ed1 1,3.<\/p>","answer":"N\u0103m 1955 có % thay \u0111\u1ed5i là  1,46 > 1,3  (không ch\u1ecdn)<\/p>N\u0103m 1960<\/span> có % thay \u0111\u1ed5i là  1,02 < 1,3<\/span>  (ch\u1ecdn)<\/p>N\u0103m 1965<\/span> có % thay \u0111\u1ed5i là  1,00 < 1,3<\/span>  (ch\u1ecdn)<\/p>N\u0103m 1970<\/span> có % thay \u0111\u1ed5i là  1,28 < 1,3<\/span>  (ch\u1ecdn)<\/p>N\u0103m 1975 có % thay \u0111\u1ed5i là  1,39 > 1,3  (không ch\u1ecdn)<\/p>V\u1eady các \u0111áp án c\u1ea7n ch\u1ecdn là  1960 , 1965 , 1970<\/span><\/strong> .<\/p>","type":"checkbox","extra_type":"shape1","time":"0","user_id":"131","test":"1","date":"2021-08-28 12:54:13","option_type":"txt","len":0},{"id":"6775","post_id":"4601","mon_id":"1158113","chapter_id":"1158126","question":"Có bao nhiêu phép \u0111\u1ed5i \u0111úng<\/b> ?<\/p>1. <\/strong> 32 cm = 0,32 m  ; <\/p>2. <\/strong> 590 mm = 0,59 m   ; <\/p>3.<\/strong>  1808 mm = 18,08 m  ;<\/p>4.<\/strong>  5600 cm = 5,6 dam   ;    <\/p>5.<\/strong>  60 dm = 0,60 dam<\/p>Có  <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/>  phép \u0111\u1ed5i \u0111úng<\/strong>.<\/p>","options":"","correct":["[\"4\"]"],"level":"3","hint":"\u0110\u1ed5i sang phân s\u1ed1 th\u1eadp phân r\u1ed3i vi\u1ebft sang s\u1ed1 th\u1eadp phân.<\/p>1 m = 10 dm = 100 cm = 1000 mm<\/strong><\/p>1 dam = 10 m = 100 dm = 1000 cm = 10000 mm<\/strong><\/p>","answer":"1.<\/span> <\/strong> 32 cm = 0,32 m         (\u0111úng <\/span>vì 32 cm =  $\\dfrac{32}{100}$<\/span> m = 0,32 m)<\/p>2.<\/span> <\/strong> 590 mm = 0,59 m      (\u0111úng<\/span> vì 590 mm = $\\dfrac{590}{1000}$<\/span> m = 0,590 m =0,59 m)<\/p>3.<\/strong>  1808 mm = 18,08 m  (sai <\/span>vì 1808 mm = $\\dfrac{1808}{1000}$<\/span> m = 1,808 m)<\/p>4.<\/strong><\/span>  5600 cm = 5,6 dam    (\u0111úng<\/span> vì 5600 cm = $\\dfrac{5600}{1000}$<\/span> dam = 5,600 dam = 5,6 dam)<\/p>5.<\/strong><\/span>  60 dm = 0,60 dam      (\u0111úng<\/span> vì 60 dm = $\\dfrac{60}{100}$<\/span> dam = 0,60 dam = 0,6 dam)<\/p>V\u1eady có 4 phép \u0111\u1ed5i \u0111úng<\/strong> là  1 , 2 , 4 , 5.<\/p>S\u1ed1 c\u1ea7n \u0111i\u1ec1n là  4<\/strong><\/span>.<\/p>Chú ý.<\/strong> Khi ta thêm ho\u1eb7c b\u1edbt<\/strong> các ch\u1eef s\u1ed1 0<\/strong> vào bên ph\u1ea3i ph\u1ea7n th\u1eadp phân<\/strong> c\u1ee7a m\u1ed9t s\u1ed1 th\u1eadp phân thì s\u1ed1 th\u1eadp phân \u0111ó không \u0111\u1ed5i<\/strong>.<\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"3","date":"2021-08-28 13:37:39"},{"id":"6777","post_id":"4601","mon_id":"1158113","chapter_id":"1158126","question":"Có bao nhiêu s\u1ed1 nguyên x th\u1ecfa mãn: 22,36 < x < 29,156 <\/strong>?<\/p>","options":["5","6","7","8"],"correct":"3","level":"3","hint":"","answer":"Vì  22,36 < x < 29,156<\/strong>  mà x là s\u1ed1 nguyên nên x<\/strong> $\\in \\{$<\/span> 23 ; 24 ; 25 ; 26 ; 27 ; 28 ; 29<\/strong> $\\}$<\/span> .<\/p>V\u1eady có 7 s\u1ed1 nguyên x<\/strong><\/span> th\u1ecfa mãn yêu c\u1ea7u.<\/p>\u0110áp án \u0111úng là  7<\/span><\/strong> .<\/p>","type":"choose","extra_type":"star","time":"0","user_id":"131","test":"1","date":"2021-08-28 13:53:50","option_type":"txt","len":0}]}