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HomeLớp 7Toán lớp 7 - Sách kết nối tri thứcBài 4: Thứ tự thực hiện các phép tính, quy tắc chuyển vếBài tập nâng cao
{"common":{"save":0,"post_id":"5661","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6942","post_id":"5661","mon_id":"1158532","chapter_id":"1158544","question":"<p>Trong tu\u1ea7n tr\u01b0\u1edbc Nam \u0111ã ch\u01a1i bóng \u0111á, bóng r\u1ed5 và c\u1ea7u lông v\u1edbi t\u1ed5ng th\u1eddi gian là 10,5 gi\u1edd. Bi\u1ebft th\u1eddi gian Nam ch\u01a1i bóng \u0111á và c\u1ea7u lông l\u1ea7n l\u01b0\u1ee3t là <span class=\"math-tex\">$4\\dfrac{1}{2}$<\/span> gi\u1edd và <span class=\"math-tex\">$2\\dfrac{1}{3}$<\/span> gi\u1edd. Tìm th\u1eddi gian Nam ch\u01a1i bóng r\u1ed5 trong tu\u1ea7n tr\u01b0\u1edbc.<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{11}{3}$<\/span> gi\u1edd","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{11}{4}$<\/span> gi\u1edd","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{13}{4}$<\/span> gi\u1edd","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{13}{3}$<\/span>gi\u1edd"],"correct":"1","level":"3","hint":"","answer":"<p>Th\u1eddi gian Nam ch\u01a1i bóng r\u1ed5 là<\/p><p><span class=\"math-tex\">$10,5-4\\dfrac{1}{2}-2\\dfrac{1}{3}=\\dfrac{21}{2}-\\dfrac{9}{2}-\\dfrac{7}{3}=\\dfrac{63}{6}-\\dfrac{27}{6}-\\dfrac{14}{6}=\\dfrac{22}{6}=\\dfrac{11}{3}$<\/span> (gi\u1edd)<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{11}{3}$<\/span> gi\u1edd<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-04-05 09:43:17","option_type":"math","len":0},{"id":"6945","post_id":"5661","mon_id":"1158532","chapter_id":"1158544","question":"<p>Anh Ba \u0111\u1eb7t mua 12 cái bánh pizza cho m\u1ed9t bu\u1ed5i liên hoan \u0111\u1ea7u n\u0103m. Ngo\u1ea1i tr\u1eeb anh Ba \u0111ã \u0103n h\u1ebft m\u1ed9t n\u1eeda chi\u1ebfc bánh pizza, m\u1ed7i ng\u01b0\u1eddi còn l\u1ea1i trong bu\u1ed5i liên hoan \u0111\u1ec1u \u0103n h\u1ebft <span class=\"math-tex\">$\\dfrac{1}{4}$<\/span> c\u1ee7a m\u1ed9t chi\u1ebfc bánh. Tính s\u1ed1 ng\u01b0\u1eddi trong bu\u1ed5i liên hoan, bi\u1ebft t\u1ea5t c\u1ea3 bánh \u0111\u1ec1u \u0111\u01b0\u1ee3c \u0103n h\u1ebft.<\/p><p>\u0110áp s\u1ed1: Bu\u1ed5i liên hoan có <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/> ng\u01b0\u1eddi.<\/p>","options":"","correct":["[\"47\"]"],"level":"3","hint":"","answer":"<p>Vì anh Ba \u0111ã \u0103n m\u1ed9t n\u1eeda chi\u1ebfc bánh pizza nên s\u1ed1 bánh còn l\u1ea1i sau khi anh Ba \u0103n là:<\/p><p><span class=\"math-tex\">$12-\\dfrac{1}{2}=\\dfrac{24-1}{2}=\\dfrac{23}{2}$<\/span> (chi\u1ebfc bánh)<\/p><p>S\u1ed1 ng\u01b0\u1eddi c\u1ee7a bu\u1ed5i liên hoan không tính anh Ba là:<\/p><p><span class=\"math-tex\">$\\dfrac{23}{2}:\\dfrac{1}{4}=\\dfrac{23}{2}.4=46$<\/span> (ng\u01b0\u1eddi)<\/p><p>V\u1eady k\u1ec3 c\u1ea3 anh Ba thì bu\u1ed5i liên hoan có 46 + 1 = 47 ng\u01b0\u1eddi.<\/p><p>S\u1ed1 c\u1ea7n \u0111i\u1ec1n là <span style=\"color:#16a085;\"><strong>47<\/strong><\/span><\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"3","date":"2022-04-05 09:52:08"},{"id":"6947","post_id":"5661","mon_id":"1158532","chapter_id":"1158544","question":"<p>Tính giá tr\u1ecb bi\u1ec3u th\u1ee9c<\/p><p><span class=\"math-tex\">$\\dfrac{1}{16}: \\left( \\dfrac{1}{3}-\\dfrac{1}{4} \\right)^2+0,25^3.4^3-12^5:(-6)^5$<\/span><\/p>","options":["<strong>A. <\/strong>42","<strong>B.<\/strong> -42","<strong>C. <\/strong>43","<strong>D.<\/strong> -43"],"correct":"1","level":"3","hint":"","answer":"<p><span class=\"math-tex\">$\\dfrac{1}{16}: \\left( \\dfrac{1}{3}-\\dfrac{1}{4} \\right)^2+0,25^3.4^3-12^5:(-6)^5$<\/span><\/p><p>= <span class=\"math-tex\">$\\dfrac{1}{16}: \\left( \\dfrac{4}{12}-\\dfrac{3}{12} \\right)^2+(0,25.4)^3-[12:(-6)]^5$<\/span><\/p><p>= <span class=\"math-tex\">$\\dfrac{1}{16}: \\left( \\dfrac{1}{12} \\right)^2+1^3-(-2)^5$<\/span><\/p><p>= <span class=\"math-tex\">$\\dfrac{1}{16}: \\dfrac{1}{144}+1-(-32)$<\/span><\/p><p>= <span class=\"math-tex\">$\\dfrac{1}{16}. 144 +1 + 32$<\/span><\/p><p>= <span class=\"math-tex\">$9 + 33 = 42$<\/span><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A.<\/strong> 42<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-04-06 08:56:18","option_type":"txt","len":0}]}