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{"segment":[{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai25/lv1/img\/3.jpg' \/><\/center> H\u00e3y ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","select":["A. N\u1ebfu a = b th\u00ec a + c = b + c","B. N\u1ebfu a = b th\u00ec a + c > b + c","C. N\u1ebfu a = b th\u00ec a + c < b + c","D. T\u1ea5t c\u1ea3 c\u00e1c \u0111\u00e1p \u00e1n tr\u00ean \u0111\u1ec1u sai"],"hint":"","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3:<br\/>N\u1ebfu a = b th\u00ec a + c = b + c<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. N\u1ebfu a = b th\u00ec a + c = b + c<\/span><\/span> <br\/>","column":2}]}],"id_ques":1181},{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai25/lv1/img\/5.jpg' \/><\/center> N\u1ebfu a = b th\u00ec b = a. \u0110\u00fang hay sai?","select":["A. \u0110\u00fang","B. Sai"],"hint":"","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3:<br\/>N\u1ebfu a = b th\u00ec b = a<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. \u0110\u00fang<\/span><\/span> <br\/>","column":2}]}],"id_ques":1182},{"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 s\u1ed1 nguy\u00ean x, bi\u1ebft:<br\/>x - 1 = 3","select":["A. x = 2","B. x = -2","C. x = -4","D. x = 4"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Khi chuy\u1ec3n m\u1ed9t s\u1ed1 h\u1ea1ng t\u1eeb v\u1ebf n\u00e0y sang v\u1ebf kia c\u1ee7a m\u1ed9t \u0111\u1eb3ng th\u1ee9c, ta ph\u1ea3i \u0111\u1ed5i d\u1ea5u s\u1ed1 h\u1ea1ng \u0111\u00f3: d\u1ea5u (+) \u0111\u1ed5i th\u00e0nh d\u1ea5u (-) v\u00e0 d\u1ea5u (-) \u0111\u1ed5i th\u00e0nh d\u1ea5u (+)<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>$\\begin{align*}x - 1 &= 3\\\\x &= 3 + 1 \\\\x&= 4\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> D. x = 4<\/span><\/span> <br\/>","column":2}]}],"id_ques":1183},{"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 s\u1ed1 nguy\u00ean x, bi\u1ebft:<br\/>x + 5 = 8","select":["A. x = 3","B. x = -3","C. x = -13","D. x = 13"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Khi chuy\u1ec3n m\u1ed9t s\u1ed1 h\u1ea1ng t\u1eeb v\u1ebf n\u00e0y sang v\u1ebf kia c\u1ee7a m\u1ed9t \u0111\u1eb3ng th\u1ee9c, ta ph\u1ea3i \u0111\u1ed5i d\u1ea5u s\u1ed1 h\u1ea1ng \u0111\u00f3: d\u1ea5u (+) \u0111\u1ed5i th\u00e0nh d\u1ea5u (-) v\u00e0 d\u1ea5u (-) \u0111\u1ed5i th\u00e0nh d\u1ea5u (+)<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>$\\begin{align*}x + 5 &= 8\\\\x &= 8 - 5 \\\\x&= 3\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. x = 3<\/span><\/span> <br\/>","column":2}]}],"id_ques":1184},{"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 s\u1ed1 nguy\u00ean x, bi\u1ebft:<br\/>x - (-1) = 9","select":["A. x = 8","B. x = -8","C. x = 10","D. x = -10"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Khi chuy\u1ec3n m\u1ed9t s\u1ed1 h\u1ea1ng t\u1eeb v\u1ebf n\u00e0y sang v\u1ebf kia c\u1ee7a m\u1ed9t \u0111\u1eb3ng th\u1ee9c, ta ph\u1ea3i \u0111\u1ed5i d\u1ea5u s\u1ed1 h\u1ea1ng \u0111\u00f3: d\u1ea5u (+) \u0111\u1ed5i th\u00e0nh d\u1ea5u (-) v\u00e0 d\u1ea5u (-) \u0111\u1ed5i th\u00e0nh d\u1ea5u (+)<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>$\\begin{align*}x - (-1) &= 9\\\\x &= 9 + (-1) \\\\x&= 9 - 1\\\\x&= 8\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. x = 8<\/span><\/span> <br\/>","column":2}]}],"id_ques":1185},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" T\u00ecm s\u1ed1 nguy\u00ean a, bi\u1ebft:<br\/>|a| = 3","select":["A. a = 3","B. a = -3","C. a = 3 ho\u1eb7c a = -3"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Kho\u1ea3ng c\u00e1ch t\u1eeb \u0111i\u1ec3m a \u0111\u1ebfn \u0111i\u1ec3m 0 tr\u00ean tr\u1ee5c s\u1ed1 l\u00e0 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a s\u1ed1 nguy\u00ean a<br\/> N\u00ean:<b> |x| = a (a $\\in$ N) th\u00ec x = a ho\u1eb7c x = -a<\/b><\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>|a| = 3 n\u00ean a = 3 ho\u1eb7c a = -3<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> C. a = 3 ho\u1eb7c a = -3<\/span><\/span> <br\/>","column":3}]}],"id_ques":1186},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" T\u00ecm s\u1ed1 nguy\u00ean a, bi\u1ebft:<br\/>|a| = 4","select":["A. a = 4","B. a = -4","C. a = 4 ho\u1eb7c a = -4"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Kho\u1ea3ng c\u00e1ch t\u1eeb \u0111i\u1ec3m a \u0111\u1ebfn \u0111i\u1ec3m 0 tr\u00ean tr\u1ee5c s\u1ed1 l\u00e0 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a s\u1ed1 nguy\u00ean a<br\/>N\u00ean:<b> |x| = a (a $\\in$ N) th\u00ec x = a ho\u1eb7c x = -a<\/b><\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>|a| = 4 n\u00ean a = 4 ho\u1eb7c a = -4<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> C. a = 4 ho\u1eb7c a = -4<\/span><\/span> <br\/>","column":3}]}],"id_ques":1187},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" T\u00ecm s\u1ed1 nguy\u00ean a, bi\u1ebft:<br\/>|a + 1| = 4","select":["A. a = 3","B. a = 5","C. a = 3 ho\u1eb7c a = -5","D. a = 3 ho\u1eb7c a = 5"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Kho\u1ea3ng c\u00e1ch t\u1eeb \u0111i\u1ec3m a \u0111\u1ebfn \u0111i\u1ec3m 0 tr\u00ean tr\u1ee5c s\u1ed1 l\u00e0 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a s\u1ed1 nguy\u00ean a<br\/>N\u00ean:<b> |x| = a (a $\\in$ N) th\u00ec x = a ho\u1eb7c x = -a<\/b><\/span> <br\/><br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>|a + 1| = 4 n\u00ean a + 1 = 4 ho\u1eb7c a + 1 = -4<br\/>+) <br\/>$\\begin{align*}a + 1 &= 4\\\\a&= 4 - 1 \\\\a&= 3\\end{align*}$<br\/>+) <br\/>$\\begin{align*}a + 1 &= -4\\\\a&= -4 - 1 \\\\a&= - (4 + 1)\\\\a&= -5\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> C. a = 3 ho\u1eb7c a = -5<\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1188},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Cho a, b $\\in$ Z. T\u00ecm s\u1ed1 nguy\u00ean x, bi\u1ebft:<br\/>a + x = b","select":["A. x = a + b","B. x = a - b","C. x = b - a","D. x = -b - a"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Khi chuy\u1ec3n m\u1ed9t s\u1ed1 h\u1ea1ng t\u1eeb v\u1ebf n\u00e0y sang v\u1ebf kia c\u1ee7a \u0111\u1eb3ng th\u1ee9c, ta ph\u1ea3i \u0111\u1ed5i d\u1ea5u s\u1ed1 h\u1ea1ng \u0111\u00f3: d\u1ea5u ( + ) \u0111\u1ed5i th\u00e0nh d\u1ea5u (-) v\u00e0 d\u1ea5u (-) \u0111\u1ed5i th\u00e0nh d\u1ea5u (+)<\/span><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>a + x = b $\\Rightarrow$ x = b - a<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'>C. x = b - a<\/span><\/span> <br\/>","column":2}]}],"id_ques":1189},{"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":" Cho a, b $\\in$ Z. T\u00ecm s\u1ed1 nguy\u00ean x, bi\u1ebft:<br\/>x - a = b","select":["A. x = b + a","B. x = a - b","C. x = b - a","D. x = -b - a"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Khi chuy\u1ec3n m\u1ed9t s\u1ed1 h\u1ea1ng t\u1eeb v\u1ebf n\u00e0y sang v\u1ebf kia c\u1ee7a \u0111\u1eb3ng th\u1ee9c, ta ph\u1ea3i \u0111\u1ed5i d\u1ea5u s\u1ed1 h\u1ea1ng \u0111\u00f3: d\u1ea5u ( + ) \u0111\u1ed5i th\u00e0nh d\u1ea5u (-) v\u00e0 d\u1ea5u (-) \u0111\u1ed5i th\u00e0nh d\u1ea5u (+)<\/span><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>x - a = b $\\Rightarrow$ x = b + a<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'>A. x = b + a<\/span><\/span> <br\/>","column":2}]}],"id_ques":1190},{"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":" Cho a, b $\\in$ Z. T\u00ecm s\u1ed1 nguy\u00ean x, bi\u1ebft:<br\/>x - a = -b","select":["A. x = b + a","B. x = -b - a","C. x = b - a","D. x = -b + a"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Khi chuy\u1ec3n m\u1ed9t s\u1ed1 h\u1ea1ng t\u1eeb v\u1ebf n\u00e0y sang v\u1ebf kia c\u1ee7a \u0111\u1eb3ng th\u1ee9c, ta ph\u1ea3i \u0111\u1ed5i d\u1ea5u s\u1ed1 h\u1ea1ng \u0111\u00f3: d\u1ea5u ( + ) \u0111\u1ed5i th\u00e0nh d\u1ea5u (-) v\u00e0 d\u1ea5u (-) \u0111\u1ed5i th\u00e0nh d\u1ea5u (+)<\/span><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>x - a = -b $\\Rightarrow$ x = -b + a<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'>D. x = -b + a<\/span><\/span> <br\/>","column":2}]}],"id_ques":1191},{"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 s\u1ed1 nguy\u00ean x, bi\u1ebft r\u1eb1ng t\u1ed5ng c\u1ee7a ba s\u1ed1: 4, -1 v\u00e0 x b\u1eb1ng 6.","select":["A. x = 3","B. x = -3","C. x = 1","D. x = -1"],"hint":"","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>T\u1ed5ng c\u1ee7a ba s\u1ed1: 4, -1 v\u00e0 x b\u1eb1ng 6<br\/>N\u00ean <br\/>$\\begin{align*}4 + (-1) + x &= 6\\\\4 - 1 + x&= 6 \\\\3 + x&= 6\\\\x&= 6 - 3\\\\x&= 3\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. x = 3<\/span><\/span> <br\/>","column":2}]}],"id_ques":1192},{"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 s\u1ed1 nguy\u00ean x, bi\u1ebft r\u1eb1ng t\u1ed5ng c\u1ee7a ba s\u1ed1: -3, 5 v\u00e0 x b\u1eb1ng 9.","select":["A. x = 1","B. x = -1","C. x = -7","D. x = 7"],"hint":"","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>T\u1ed5ng c\u1ee7a ba s\u1ed1: -3, 5 v\u00e0 x b\u1eb1ng 9<br\/>N\u00ean<br\/> $\\begin{align*}(-3) + 5 + x &= 9\\\\5 - 3 + x&= 9 \\\\2 + x&= 9\\\\x&= 9 - 2\\\\x&= 7\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> D. x = 7<\/span><\/span> <br\/>","column":2}]}],"id_ques":1193},{"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 s\u1ed1 nguy\u00ean x, bi\u1ebft r\u1eb1ng t\u1ed5ng c\u1ee7a ba s\u1ed1: 8, -7 v\u00e0 x b\u1eb1ng -2.","select":["A. x = -3","B. x = 3","C. x = -1","D. x = 1"],"hint":"","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>T\u1ed5ng c\u1ee7a ba s\u1ed1: 8, -7 v\u00e0 x b\u1eb1ng -2<br\/>N\u00ean <br\/>$\\begin{align*}8 + (-7) + x&= -2\\\\8 - 7 + x&= -2 \\\\1 + x&= -2\\\\x&= -2 - 1\\\\x&= - (2 + 1)\\\\x&= -3\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. x = -3<\/span><\/span> <br\/>","column":2}]}],"id_ques":1194},{"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":[[["-31"]]],"list":[{"point":5,"width":60,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai25/lv1/img\/2.jpg' \/><\/center>-(3 - 2 + 11) + (-2 - 17)= _input_","hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Thay \u0111\u1ed5i v\u1ecb tr\u00ed s\u1ed1 h\u1ea1ng v\u00e0 b\u1ecf ho\u1eb7c \u0111\u1eb7t d\u1ea5u ngo\u1eb7c m\u1ed9t c\u00e1ch th\u00edch h\u1ee3p r\u1ed3i t\u00ednh.<br\/><b>L\u01b0u \u00fd: <\/b><br\/>+ Khi b\u1ecf d\u1ea5u ngo\u1eb7c c\u00f3 d\u1ea5u (-) \u0111\u1eb1ng tr\u01b0\u1edbc, ta ph\u1ea3i \u0111\u1ed5i t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 h\u1ea1ng trong d\u1ea5u ngo\u1eb7c: d\u1ea5u ( + ) th\u00e0nh d\u1ea5u ( - ) v\u00e0 d\u1ea5u ( - ) th\u00e0nh d\u1ea5u ( + )<br\/>+ Khi b\u1ecf d\u1ea5u ngo\u1eb7c c\u00f3 d\u1ea5u ( + ) \u0111\u1eb1ng tr\u01b0\u1edbc th\u00ec d\u1ea5u c\u00e1c s\u1ed1 h\u1ea1ng trong ngo\u1eb7c v\u1eabn gi\u1eef nguy\u00ean.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>$\\begin{align*}-(3 - 2 + 11) + (-2 - 17) &= -3 + 2 - 11 - 2 - 17\\\\&= - (3 + 17 + 11) + (2 - 2)\\\\&= -31 + 0\\\\&= -31\\end{align*}$<br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> -31<\/span><\/span> <br\/> "}]}],"id_ques":1195},{"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":[[["-24"]]],"list":[{"point":5,"width":60,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai25/lv1/img\/2.jpg' \/><\/center> -(14 + 17) + (20 - 13)= _input_","hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Thay \u0111\u1ed5i v\u1ecb tr\u00ed s\u1ed1 h\u1ea1ng v\u00e0 b\u1ecf ho\u1eb7c \u0111\u1eb7t d\u1ea5u ngo\u1eb7c m\u1ed9t c\u00e1ch th\u00edch h\u1ee3p r\u1ed3i t\u00ednh.<br\/><b>L\u01b0u \u00fd: <\/b><br\/>+ Khi b\u1ecf d\u1ea5u ngo\u1eb7c c\u00f3 d\u1ea5u (-) \u0111\u1eb1ng tr\u01b0\u1edbc, ta ph\u1ea3i \u0111\u1ed5i t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 h\u1ea1ng trong d\u1ea5u ngo\u1eb7c: d\u1ea5u ( + ) th\u00e0nh d\u1ea5u ( - ) v\u00e0 d\u1ea5u ( - ) th\u00e0nh d\u1ea5u ( + )<br\/>+ Khi b\u1ecf d\u1ea5u ngo\u1eb7c c\u00f3 d\u1ea5u ( + ) \u0111\u1eb1ng tr\u01b0\u1edbc th\u00ec d\u1ea5u c\u00e1c s\u1ed1 h\u1ea1ng trong ngo\u1eb7c v\u1eabn gi\u1eef nguy\u00ean.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>$\\begin{align*}-(14 + 17) + (20 - 13) &= -14 - 17 + 20 - 13\\\\&= -(17 + 13) + (20 - 14)\\\\&= -30 + 6\\\\&= -24\\end{align*}$<br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> -24<\/span><\/span> <br\/> "}]}],"id_ques":1196},{"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":[[["-16"]]],"list":[{"point":5,"width":60,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai25/lv1/img\/2.jpg' \/><\/center> (-55 + 28 + 48) - (-39 + 28 + 48) = _input_","hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Thay \u0111\u1ed5i v\u1ecb tr\u00ed s\u1ed1 h\u1ea1ng v\u00e0 b\u1ecf ho\u1eb7c \u0111\u1eb7t d\u1ea5u ngo\u1eb7c m\u1ed9t c\u00e1ch th\u00edch h\u1ee3p r\u1ed3i t\u00ednh.<br\/><b>L\u01b0u \u00fd: <\/b><br\/>+ Khi b\u1ecf d\u1ea5u ngo\u1eb7c c\u00f3 d\u1ea5u (-) \u0111\u1eb1ng tr\u01b0\u1edbc, ta ph\u1ea3i \u0111\u1ed5i t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 h\u1ea1ng trong d\u1ea5u ngo\u1eb7c: d\u1ea5u ( + ) th\u00e0nh d\u1ea5u ( - ) v\u00e0 d\u1ea5u ( - ) th\u00e0nh d\u1ea5u ( + )<br\/>+ Khi b\u1ecf d\u1ea5u ngo\u1eb7c c\u00f3 d\u1ea5u ( + ) \u0111\u1eb1ng tr\u01b0\u1edbc th\u00ec d\u1ea5u c\u00e1c s\u1ed1 h\u1ea1ng trong ngo\u1eb7c v\u1eabn gi\u1eef nguy\u00ean.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>$\\begin{align*}(-55 + 28 + 48) - (-39 + 28 + 48) &= -55 + 28 + 48 + 39 - 28 - 48\\\\&= (28 - 28) + (48 - 48) - (55 - 39)\\\\&= 0 + 0 - 16\\\\&= -16\\end{align*}$<br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> -16<\/span><\/span> <br\/> "}]}],"id_ques":1197},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00fang hay sai","title_trans":"","temp":"true_false","correct":[["t","t","f"]],"list":[{"point":5,"image":"","col_name":["","\u0110\u00fang","Sai"],"arr_ques":[" 16 - x = 19 th\u00ec x = -3 "," x - (-3) = 7 th\u00ec x = 4 "," x + 17 = 15 th\u00ec x = 2"],"hint":"","explain":["16 - x = 19 th\u00ec x = -3 (\u0110\u00fang). V\u00ec <br\/>$\\begin{align*}16 - x &= 19\\\\x &= 16 - 19 \\\\x&= -(19 - 16)\\\\x&= -3\\end{align*}$ ","<br\/> x - (-3) = 7 th\u00ec x = 4 (\u0110\u00fang). V\u00ec <br\/>$\\begin{align*}x - (-3) &= 7\\\\x + 3 &= 7 \\\\x&= 7 - 3\\\\x&= 4\\end{align*}$ ","<br\/> x + 17 = 15 th\u00ec x = 2 (Sai). V\u00ec<br\/> $\\begin{align*}x + 17 &= 15\\\\x &= 15 - 17 \\\\x&= -(17 - 15)\\\\x&= -2\\end{align*}$ "]}]}],"id_ques":1198},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00fang hay sai","title_trans":"","temp":"true_false","correct":[["f","t","f"]],"list":[{"point":5,"image":"","col_name":["","\u0110\u00fang","Sai"],"arr_ques":[" x - (-5) = -7 th\u00ec x = -2 "," x - 8 = 6 th\u00ec x = 14 "," 15 - x = 4 th\u00ec x = -11"],"hint":"","explain":["x - (-5) = -7 th\u00ec x = -2 (Sai). V\u00ec <br\/>$\\begin{align*}x - (-5) &= -7\\\\x &= -7 + (-5) \\\\x&= -(7 + 5)\\\\x&= -12\\end{align*}$ ","<br\/> x - 8 = 6 th\u00ec x = 14 (\u0110\u00fang). V\u00ec <br\/>$\\begin{align*}x - 8 &= 6\\\\x &= 6 + 8 \\\\x&= 14\\end{align*}$ ","<br\/> 15 - x = 4 th\u00ec x = -11 (Sai). V\u00ec<br\/> $\\begin{align*}15 - x &= 4\\\\x &= 15 - 4 \\\\x&= 11\\end{align*}$ "]}]}],"id_ques":1199},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00fang hay sai","title_trans":"","temp":"true_false","correct":[["t","t","f"]],"list":[{"point":5,"image":"","col_name":["","\u0110\u00fang","Sai"],"arr_ques":[" 8 - x = 6 th\u00ec x = 2 "," 9 + x = 15 th\u00ec x = 6 "," x - 6 = 9 th\u00ec x = -15"],"hint":"","explain":[" 8 - x = 6 th\u00ec x = 2 (\u0110\u00fang). V\u00ec <br\/>$\\begin{align*}8 - x &= 6\\\\x &= 8 - 6 \\\\x&= 2\\end{align*}$ ","<br\/> 9 + x = 15 th\u00ec x = 6 (\u0110\u00fang). V\u00ec <br\/>$\\begin{align*} 9 + x &= 15\\\\x &= 15 - 9 \\\\x&= 6\\end{align*}$ ","<br\/> x - 6 = 9 th\u00ec x = -15 (Sai). V\u00ec<br\/> $\\begin{align*}x - 6 &= 9\\\\x &= 9 + 6 \\\\x&= 15\\end{align*}$ "]}]}],"id_ques":1200}],"lesson":{"save":0,"level":1}}

Điểm của bạn.

Câu hỏi này theo dạng chọn đáp án đúng, sau khi đọc xong câu hỏi, bạn bấm vào một trong số các đáp án mà chương trình đưa ra bên dưới, sau đó bấm vào nút gửi để kiểm tra đáp án và sẵn sàng chuyển sang câu hỏi kế tiếp

Trả lời đúng trong khoảng thời gian quy định bạn sẽ được + số điểm như sau:
Trong khoảng 1 phút đầu tiên + 5 điểm
Trong khoảng 1 phút -> 2 phút + 4 điểm
Trong khoảng 2 phút -> 3 phút + 3 điểm
Trong khoảng 3 phút -> 4 phút + 2 điểm
Trong khoảng 4 phút -> 5 phút + 1 điểm

Quá 5 phút: không được cộng điểm

Tổng thời gian làm mỗi câu (không giới hạn)

Điểm của bạn.

Bấm vào đây nếu phát hiện có lỗi hoặc muốn gửi góp ý