{"common":{"save":0,"post_id":"713","level":2,"total":20,"point":5,"point_extra":0},"segment":[{"id":"171","post_id":"713","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"T\u00ecm x bi\u1ebft: <br\/> 4.(x + 41) = 400","select":["A. x = 56 ","B. x = 57 ","C. x = 58 ","D. x = 59 "],"hint":"Th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft b\u1eb1ng t\u00edch chia th\u1eeba s\u1ed1 \u0111\u00e3 bi\u1ebft, s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft b\u1eb1ng t\u1ed5ng tr\u1eeb s\u1ed1 h\u1ea1ng \u0111\u00e3 bi\u1ebft","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <br\/> <\/span><b> B\u01b0\u1edbc 1: <\/b> Coi x + 41 l\u00e0 th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft <br\/> Mu\u1ed1n t\u00ecm th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft ta l\u1ea5y t\u00edch chia s\u1ed1 h\u1ea1ng \u0111\u00e3 bi\u1ebft <br\/> <b> B\u01b0\u1edbc 2: <\/b> x l\u00e0 s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft <br\/> Mu\u1ed1n t\u00ecm s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft ta l\u1ea5y t\u1ed5ng tr\u1eeb \u0111i s\u1ed1 h\u1ea1ng \u0111\u00e3 bi\u1ebft <br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/>Ta c\u00f3: $$\\begin{align*} 4. (x + 41) &= 400 \\\\ x + 41 &= 400 : 4 \\\\ x + 41 &= 100 \\\\ x &= 100 - 41 \\\\ x &= 59\\end{align*}$$<span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D. x = 59<\/span>","column":2}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:38"},{"id":"172","post_id":"713","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"T\u00ecm x bi\u1ebft: <br\/> 15 + 5x = 40","select":["A. x = 5 ","B. x = 6 ","C. x = 4 ","D. x = 7 "],"hint":"S\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft b\u1eb1ng t\u1ed5ng tr\u1eeb s\u1ed1 h\u1ea1ng \u0111\u00e3 bi\u1ebft, th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft b\u1eb1ng t\u00edch chia th\u1eeba s\u1ed1 \u0111\u00e3 bi\u1ebft ","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <br\/> <\/span><b> B\u01b0\u1edbc 1: <\/b> Coi 5x l\u00e0 s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft <br\/> Mu\u1ed1n t\u00ecm s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft ta l\u1ea5y t\u1ed5ng tr\u1eeb \u0111i s\u1ed1 h\u1ea1ng \u0111\u00e3 bi\u1ebft <br\/> <b> B\u01b0\u1edbc 2: <\/b> x l\u00e0 th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft <br\/> Mu\u1ed1n t\u00ecm th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft ta l\u1ea5y t\u00edch chia s\u1ed1 h\u1ea1ng \u0111\u00e3 bi\u1ebft <br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/>Ta c\u00f3: $$\\begin{align*}15 + 5x &= 40 \\\\ 5x &= 40 - 15 \\\\ 5x &= 25 \\\\ x &= 5\\end{align*}$$<span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. x = 5<\/span>","column":2}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:38"},{"id":"173","post_id":"713","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":[[["129"],["32"],["300"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"H\u00e3y \u0111i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng \u0111\u1ec3 ho\u00e0n th\u00e0nh ph\u00e9p t\u00ednh sau b\u1eb1ng c\u00e1ch h\u1ee3p l\u00fd: <br\/>71 + 68 + 129 + 32 = (71 +_input_) + (68 + _input_) = _input_ ","hint":"\u00c1p d\u1ee5ng t\u00ednh ch\u1ea5t giao ho\u00e1n v\u00e0 k\u1ebft h\u1ee3p","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>\u00c1p d\u1ee5ng t\u00ednh ch\u1ea5t giao ho\u00e1n v\u00e0 k\u1ebft h\u1ee3p \u0111\u1ec3 nh\u00f3m c\u00e1c s\u1ed1 h\u1ea1ng l\u1ea1i \u0111\u1ec3 khi c\u1ed9ng \u0111\u01b0\u1ee3c s\u1ed1 tr\u00f2n ch\u1ee5c <\/span><br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $\\begin{align*} 71 + 68 + 129 + 32 &= 71 + 129 + 68 + 32 (\\text{\u00c1p d\u1ee5ng t\u00ednh ch\u1ea5t giao ho\u00e1n})\\\\ &= (71 + 129) + (68 + 32) (\\text{\u00c1p d\u1ee5ng t\u00ednh ch\u1ea5t k\u1ebft h\u1ee3p})\\\\ &= 200 + 100 \\\\ &= 300 \\end{align*}$ <br\/> V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n theo th\u1ee9 t\u1ef1 t\u1eeb tr\u00e1i sang ph\u1ea3i t\u1eeb tr\u00ean xu\u1ed1ng d\u01b0\u1edbi l\u00e0: <span class='basic_pink'>129; 32; 300<\/span>"}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:38"}]}