Ôn tập chương 2

Home Lớp 6 Toán lớp 6 - Sách kết nối tri thức Ôn tập chương IIBài tập trung bình

{"common":{"save":0,"post_id":"787","level":2,"total":20,"point":5,"point_extra":0},"segment":[{"id":"1361","post_id":"787","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["309","+309"]]],"list":[{"point":5,"width":60,"type_input":"","ques":"<center><img src='img\/2.jpg' \/><\/center>-412 + _input_ + (-115) = -218","hint":"","explain":"H\u01b0\u1edbng d\u1eabn:<\/span><br\/> B\u01b0\u1edbc 1: G\u1ecdi s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 x<br\/>B\u01b0\u1edbc 2: T\u00ecm x<\/span> <br\/><br\/>B\u00e0i gi\u1ea3i:<\/span><br\/>G\u1ecdi s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 x ta \u0111\u01b0\u1ee3c:<br\/>$\\begin{align*}-412 + x + (-115) &= -218\\\\-412 + x - 115 &= -218 \\\\x - (412 + 115)&= -218\\\\x - 527&= -218\\\\x&= -218 + 527\\\\x&= 309\\end{align*}$<br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: 309<\/span><\/span> <br\/> "}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:51"},{"id":"1362","post_id":"787","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["288","+288"]]],"list":[{"point":5,"width":60,"type_input":"","ques":"<center><img src='img\/10.jpg' \/><\/center> (-27) . (-15) - _input_ = 117","hint":"","explain":"H\u01b0\u1edbng d\u1eabn:<\/span><br\/> B\u01b0\u1edbc 1: G\u1ecdi s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 x<br\/>B\u01b0\u1edbc 2: T\u00ecm x<\/span> <br\/><br\/>B\u00e0i gi\u1ea3i:<\/span><br\/>G\u1ecdi s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 x ta \u0111\u01b0\u1ee3c:<br\/>$\\begin{align*}(-27) . (-15) - x &= 117\\\\27 . 15 - x &= 117 \\\\405 - x&= 117\\\\x&= 405 - 117\\\\x&= 288\\end{align*}$<br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: 288<\/span><\/span> <br\/> "}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:51"},{"id":"1363","post_id":"787","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":9,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" T\u00ednh t\u1ed5ng c\u1ee7a c\u00e1c s\u1ed1 nguy\u00ean x, bi\u1ebft: -4 $\\le$ x < 5. T\u1ed5ng l\u00e0:","select":["A. -4","B. 0","C. 5","D. -7"],"hint":"","explain":" H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: T\u00ecm c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a x th\u1ecfa m\u00e3n -4 $\\le$ x < 5<br\/>B\u01b0\u1edbc 2: T\u00ednh t\u1ed5ng c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a x v\u1eeba t\u00ecm \u0111\u01b0\u1ee3c<\/span> <br\/><br\/> B\u00e0i gi\u1ea3i:<\/span><br\/>-4 $\\le$ x < 5 n\u00ean x $\\in$ {-4; -3; -2; -1; 0 ; 1; 2; 3; 4 }<br\/>T\u1ed5ng c\u00e1c s\u1ed1 nguy\u00ean x l\u00e0: <br\/>$\\begin{align*}&(-4) + (-3) + (-2) + (-1) + 0 + 1 + 2 +3 + 4 \\\\&= [(-4) + 4] + [(-3) + 3] + [(-2) + 2] + [(-1) + 1] + 0\\\\& = 0 + 0 + 0 + 0 + 0\\\\&= 0\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0:B. 0<\/span><\/span> <br\/>","column":2}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:51"}]}