Toán lớp 7 - Sách kết nối tri thức - Đề kiểm tra 45 phút - Toán lớp 7 - Sách kết nối tri thức - Tháng 9 - Số 1

{"save":1,"level":1,"time":"45","total":25,"point":5,"segment":[{"id":"9864","test_id":"665","question":"<p data-end=\"703\" data-start=\"591\">K\u1ebft qu\u1ea3 c\u1ee7a ph&eacute;p t&iacute;nh&nbsp;<span class=\"math-tex\">$\\dfrac{12}{25}.\\dfrac{15}{-36}$<\/span>&nbsp;l&agrave;<\/p>","options":["<strong>A.<\/strong>&nbsp;<span class=\"math-tex\">$\\dfrac{2}{5}$<\/span>","<strong>B.<\/strong>&nbsp;<span class=\"math-tex\">$\\dfrac{1}{5}$<\/span><br data-end=\"661\" data-start=\"658\" \/>\n&nbsp;","<strong>C.<\/strong>&nbsp;<span class=\"math-tex\">$-\\dfrac{1}{5}$<\/span>","<p data-end=\"703\" data-start=\"591\"><strong>D.<\/strong> <span class=\"math-tex\">$-\\dfrac{2}{5}$<\/span><\/p>"],"correct":"3","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.<\/strong>&nbsp;<span class=\"math-tex\">$-\\dfrac{1}{5}$<\/span>.<\/span><\/p><p><span class=\"math-tex\">$\\dfrac{12}{25}.\\dfrac{15}{-36}=\\dfrac{1}{5}.\\dfrac{3}{-3}=\\dfrac{1}{5}.(-1)=-\\dfrac{1}{5}$<\/span><\/p>","type":"choose","user_id":"126","test":"2","date":"2025-08-01 16:13:10"},{"id":"9865","test_id":"665","question":"<p>M\u1ed9t b&igrave;nh n\u01b0\u1edbc c&oacute; 1,2 l&iacute;t. M\u1ed7i l\u1ea7n r&oacute;t ra 0,15 l&iacute;t. H\u1ecfi r&oacute;t \u0111\u01b0\u1ee3c nhi\u1ec1u nh\u1ea5t bao nhi&ecirc;u l\u1ea7n?<\/p>","options":["<strong>A.<\/strong> 8&nbsp;l\u1ea7n","<strong>B.<\/strong> 4 l\u1ea7n","<strong>C.<\/strong> 11 l\u1ea7n","<strong>D.<\/strong> 10 l\u1ea7n"],"correct":"1","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong> 8&nbsp;l\u1ea7n<\/span>.<\/p><p>S\u1ed1 l\u1ea7n r&oacute;t \u0111\u01b0\u1ee3c l&agrave;<\/p><p>&nbsp;<span class=\"math-tex\">$1,2:0,15=\\dfrac{12}{10}:\\dfrac{15}{100}=\\dfrac{12}{10}.\\dfrac{100}{15}=\\dfrac{4}{1}.\\dfrac{10}{5}=\\dfrac{40}{5}=8$<\/span>&nbsp;(l\u1ea7n).<\/p>","type":"choose","user_id":"126","test":"1","date":"2025-08-01 16:19:46"}]}