{"segment":[{"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":[[["-4215","- 4215"," -4215"," - 4215"," - 4215 "]]],"list":[{"point":5,"width":60,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai22/lv1/img\/2.jpg' \/><\/center>(-4215) + 0 = _input_","hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> a + 0 = 0 + a = a<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: (-4215) + 0 = -4215<br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> -4215<\/span><\/span> <br\/> "}]}],"id_ques":1041},{"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":[[["-3951","- 3951"," -3951"," - 3951"," -3951 "]]],"list":[{"point":5,"width":60,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai22/lv1/img\/2.jpg' \/><\/center>0 + (-3951) = _input_","hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> a + 0 = 0 + a = a<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: 0 + (-3951) = -3951<br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> -3951<\/span><\/span> <br\/> "}]}],"id_ques":1042},{"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":[[["0"," 0"," 0 "," 0 "]]],"list":[{"point":5,"width":60,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai22/lv1/img\/2.jpg' \/><\/center>(-6185) + 6185 = _input_","hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> T\u1ed5ng c\u1ee7a hai s\u1ed1 nguy\u00ean \u0111\u1ed1i nhau lu\u00f4n b\u1eb1ng 0<br\/><b>a + (-a) = 0<\/b><\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: (-6185) + 6185 = 0<br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> 0<\/span><\/span> <br\/> "}]}],"id_ques":1043},{"time":9,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai22/lv1/img\/2.jpg' \/><\/center>(-8) + (-5) <span class='basic_hoi_black'>?<\/span> (-5) + (-8) ","select":[">","<","="],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Ph\u00e9p c\u1ed9ng c\u00e1c s\u1ed1 nguy\u00ean c\u00f3 t\u00ednh ch\u1ea5t giao ho\u00e1n, ngh\u0129a l\u00e0:<br\/><b> a + b = b + a <\/b><\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>\u00c1p d\u1ee5ng t\u00ednh ch\u1ea5t giao ho\u00e1n, ta c\u00f3:<br\/><b>(-8) + (-5) = (-5) + (-8)<\/b><br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> =<\/span><\/span> <br\/>","column":3}]}],"id_ques":1044},{"time":9,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai22/lv1/img\/4.jpg' \/><\/center>(-12) + (-9) + (-125) <span class='basic_hoi_black'>?<\/span> (-125) + (-9) + (-12) ","select":[">","<","="],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Ph\u00e9p c\u1ed9ng c\u00e1c s\u1ed1 nguy\u00ean c\u00f3 t\u00ednh ch\u1ea5t giao ho\u00e1n, ngh\u0129a l\u00e0:<br\/><b> a + b = b + a <\/b><\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>\u00c1p d\u1ee5ng t\u00ednh ch\u1ea5t giao ho\u00e1n, ta c\u00f3:<br\/><b>(-12) + (-9) + (-125) = (-125) + (-9) + (-12)<\/b><br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> =<\/span><\/span> <br\/>","column":3}]}],"id_ques":1045},{"time":9,"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\u00ednh nhanh:<br\/>217 + [43 + (-217) + (-23)] = <span class='basic_hoi_black'>?<\/span>","select":["A. 20","B. -500","C. -20","D. 66"],"hint":"","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, t\u00ednh ch\u1ea5t k\u1ebft h\u1ee3p c\u1ee7a ph\u00e9p c\u1ed9ng \u0111\u1ec3 <b><i>nh\u00f3m c\u00e1c c\u1eb7p s\u1ed1 l\u00e0 s\u1ed1 \u0111\u1ed1i nhau ho\u1eb7c c\u00f3 t\u1ed5ng b\u1eb1ng s\u1ed1 tr\u00f2n ch\u1ee5c, tr\u00f2n tr\u0103m, tr\u00f2n ngh\u00ecn...<\/i><\/b>\u0111\u1ec3 th\u1ef1c hi\u1ec7n t\u00ednh nhanh.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>$\\begin{align*}&217 + [43 + (-217) + (-23)]\\\\&= [ 217 + (-217)] + [43 + (-23)]\\\\&= 0 + (43 - 23)\\\\&= 0 + 20\\\\&= 20\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. 20<\/span><\/span> <br\/>","column":2}]}],"id_ques":1046},{"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 nhanh:<br\/>273 + (-120) + (-270) + 120 = <span class='basic_hoi_black'>?<\/span>","select":["A. -783","B. 3","C. 783","D. -3"],"hint":"","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, t\u00ednh ch\u1ea5t k\u1ebft h\u1ee3p c\u1ee7a ph\u00e9p c\u1ed9ng \u0111\u1ec3 <b><i>nh\u00f3m c\u00e1c c\u1eb7p s\u1ed1 l\u00e0 s\u1ed1 \u0111\u1ed1i nhau ho\u1eb7c c\u00f3 t\u1ed5ng b\u1eb1ng s\u1ed1 tr\u00f2n ch\u1ee5c, tr\u00f2n tr\u0103m, tr\u00f2n ngh\u00ecn...<\/i><\/b>\u0111\u1ec3 th\u1ef1c hi\u1ec7n t\u00ednh nhanh.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>$\\begin{align*}&273 + (-120) + (-270) + 120\\\\&= [ 120 + (-120)] + [273 + (-270)]\\\\&= 0 + (273 - 270)\\\\&= 0 + 3\\\\&= 3\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. 3<\/span><\/span> <br\/>","column":2}]}],"id_ques":1047},{"time":9,"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\u00ednh nhanh:<br\/> (-30) + (-95) + 40 + 30 = <span class='basic_hoi_black'>?<\/span>","select":["A. -195","B. 5","C. -55","D. 55"],"hint":"","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, t\u00ednh ch\u1ea5t k\u1ebft h\u1ee3p c\u1ee7a ph\u00e9p c\u1ed9ng \u0111\u1ec3 <b><i>nh\u00f3m c\u00e1c c\u1eb7p s\u1ed1 l\u00e0 s\u1ed1 \u0111\u1ed1i nhau ho\u1eb7c c\u00f3 t\u1ed5ng b\u1eb1ng s\u1ed1 tr\u00f2n ch\u1ee5c, tr\u00f2n tr\u0103m, tr\u00f2n ngh\u00ecn...<\/i><\/b>\u0111\u1ec3 th\u1ef1c hi\u1ec7n t\u00ednh nhanh.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>$\\begin{align*}&(-30) + (-95) + 40 + 30\\\\&= [ 30 + (-30)] + [(-95) + 40]\\\\&= 0 + [-(95 - 40)]\\\\&= 0 + (-55)\\\\&= (-55)\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> C. -55<\/span><\/span> <br\/>","column":2}]}],"id_ques":1048},{"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":[[["-17","- 17"," -17"," - 17"," -17 "]]],"list":[{"point":5,"width":60,"type_input":"","ques":"-25 + y + 8 = y + ( _input_)","hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> S\u1eed d\u1ee5ng t\u00ednh ch\u1ea5t k\u1ebft h\u1ee3p c\u1ee7a ph\u00e9p c\u1ed9ng c\u00e1c s\u1ed1 nguy\u00ean \u0111\u1ec3 t\u00ecm s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: <br\/> $\\begin{align*}&-25 + y + 8\\\\&= y + [(-25) + 8]\\\\&= y + [-(25 - 8)]\\\\&= y + (-17)\\end{align*}$<br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> -17<\/span><\/span> <br\/> "}]}],"id_ques":1049},{"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":[[["29"," 29","+29","+ 29"," 29 "]]],"list":[{"point":5,"width":60,"type_input":"","ques":"y + 45 + (-16) = y + ( _input_)","hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> S\u1eed d\u1ee5ng t\u00ednh ch\u1ea5t k\u1ebft h\u1ee3p c\u1ee7a ph\u00e9p c\u1ed9ng c\u00e1c s\u1ed1 nguy\u00ean \u0111\u1ec3 t\u00ecm s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: <br\/> $\\begin{align*}&y + 45 + (-16)\\\\&= y + [45 + (-16)]\\\\&= y + (45 - 16)\\\\&= y + 29\\end{align*}$<br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> 29<\/span><\/span> <br\/> "}]}],"id_ques":1050},{"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\u00e1c s\u1ed1 nguy\u00ean x, bi\u1ebft: -3 < x $\\le$ 4 ","select":["A. 4","B. 7 ","C. -3","D. -4"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: T\u00ecm c\u00e1c s\u1ed1 nguy\u00ean x th\u1ecfa m\u00e3n -3 < x $\\le$ 4 <br\/>B\u01b0\u1edbc 2: T\u00ednh t\u1ed5ng c\u00e1c s\u1ed1 nguy\u00ean x v\u1eeba t\u00ecm \u0111\u01b0\u1ee3c \u1edf b\u01b0\u1edbc 1<br\/><b>L\u01b0u \u00fd: <\/b> <i>Hai s\u1ed1 nguy\u00ean \u0111\u1ed1i nhau c\u00f3 t\u1ed5ng b\u1eb1ng 0<\/i><\/span> <br\/><br\/><span class='basic_left'> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: -3 < x $\\le$ 4 $\\Rightarrow $ x $ \\in$ {-2; -1; 0; 1; 2; 3; 4}<br\/> T\u1ed5ng c\u1ee7a c\u00e1c s\u1ed1 nguy\u00ean x l\u00e0:<br\/>$\\begin{align*}& (-2) + (-1) + 0 + 1 + 2 + 3 + 4 \\\\&= [(-2) + 2] + [(-1) + 1] + 0 + + 3 + 4 \\\\&= 0 + 0 + 0 + 3 + 4\\\\&= 7\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. 7<\/span><\/span><\/span> <br\/>","column":2}]}],"id_ques":1051},{"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\u00e1c s\u1ed1 nguy\u00ean x, bi\u1ebft: -6 < x $\\le$ 4 ","select":["A. -6","B. -5 ","C. -11","D. -9"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: T\u00ecm c\u00e1c s\u1ed1 nguy\u00ean x th\u1ecfa m\u00e3n -6 < x $\\le$ 4 <br\/>B\u01b0\u1edbc 2: T\u00ednh t\u1ed5ng c\u00e1c s\u1ed1 nguy\u00ean x v\u1eeba t\u00ecm \u0111\u01b0\u1ee3c \u1edf b\u01b0\u1edbc 1<br\/><b>L\u01b0u \u00fd: <\/b> <i>Hai s\u1ed1 nguy\u00ean \u0111\u1ed1i nhau c\u00f3 t\u1ed5ng b\u1eb1ng 0<\/i><\/span> <br\/><br\/><span class='basic_left'> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: -6 < x $\\le$ 4 $\\Rightarrow $ x $ \\in$ {-5; -4; -3; -2; -1; 0; 1; 2; 3; 4}<br\/> T\u1ed5ng c\u1ee7a c\u00e1c s\u1ed1 nguy\u00ean x l\u00e0:<br\/>$\\begin{align*}& (-5) + (-4) + (-3) + (-2) + (-1) + 0 + 1 + 2 + 3 + 4 \\\\&= (-5) + [(-4) + 4] + [(-3) + 3] + [(-2) + 2] + [(-1) + 1] + 0 \\\\&= (-5) + 0 + 0 + 0 + 0 + 0\\\\&= -5\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. -5<\/span><\/span><\/span> <br\/>","column":2}]}],"id_ques":1052},{"time":9,"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\u00ednh t\u1ed5ng c\u00e1c s\u1ed1 nguy\u00ean x, bi\u1ebft: -7 $\\le$ x < 5 ","select":["A. -11","B. -13 ","C. -18","D. -6"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: T\u00ecm c\u00e1c s\u1ed1 nguy\u00ean x th\u1ecfa m\u00e3n -7 $\\le$ x < 5 <br\/>B\u01b0\u1edbc 2: T\u00ednh t\u1ed5ng c\u00e1c s\u1ed1 nguy\u00ean x v\u1eeba t\u00ecm \u0111\u01b0\u1ee3c \u1edf b\u01b0\u1edbc 1<br\/><b>L\u01b0u \u00fd: <\/b> <i>Hai s\u1ed1 nguy\u00ean \u0111\u1ed1i nhau c\u00f3 t\u1ed5ng b\u1eb1ng 0<\/i><\/span> <br\/><br\/><span class='basic_left'> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: -7 $\\le$ x < 5 $\\Rightarrow $ x $ \\in$ {-7; -6; -5; -4; -3; -2; -1; 0; 1; 2; 3; 4}<br\/> T\u1ed5ng c\u1ee7a c\u00e1c s\u1ed1 nguy\u00ean x l\u00e0:<br\/>$\\begin{align*}& (-7) + (-6) + (-5) + (-4) + (-3) + (-2) + (-1) + 0 + 1 + 2 + 3 + 4 \\\\&= (-7) + (-6) + (-5) + [(-4) + 4] + [(-3) + 3] + [(-2) + 2] + [(-1) + 1] + 0 \\\\&= -(7 + 6 + 5) + 0 + 0 + 0 + 0 + 0\\\\&= -18 \\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> C. -18<\/span><\/span><\/span> <br\/>","column":2}]}],"id_ques":1053},{"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":[[["-28","- 28"," -28"," - 28"," -28 "]]],"list":[{"point":5,"width":60,"type_input":"","ques":"-40 + y + 12 = y + ( _input_)","hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> S\u1eed d\u1ee5ng t\u00ednh ch\u1ea5t k\u1ebft h\u1ee3p c\u1ee7a ph\u00e9p c\u1ed9ng c\u00e1c s\u1ed1 nguy\u00ean \u0111\u1ec3 t\u00ecm s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3:<br\/> $\\begin{align*}&-40 + y + 12\\\\&= y + [(-40) + 12]\\\\&= y + [-(40 - 12)]\\\\&= y + (-28)\\end{align*}$<br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> -28<\/span><\/span> <br\/> "}]}],"id_ques":1054},{"time":9,"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\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c:<br\/>A = x + (-15) , bi\u1ebft x = 25","select":["A = 10","A = -10","A = 40","A = -40"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: Thay gi\u00e1 tr\u1ecb c\u1ee7a x v\u00e0o bi\u1ec3u th\u1ee9c A<br\/>B\u01b0\u1edbc 2: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c A <br\/>(<i><b>L\u01b0u \u00fd:<\/b> Mu\u1ed1n c\u1ed9ng hai s\u1ed1 nguy\u00ean kh\u00e1c d\u1ea5u kh\u00f4ng \u0111\u1ed1i nhau, ta t\u00ecm hi\u1ec7u hai gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a ch\u00fang ( s\u1ed1 l\u1edbn tr\u1eeb s\u1ed1 nh\u1ecf) r\u1ed3i \u0111\u1eb7t tr\u01b0\u1edbc k\u1ebft qu\u1ea3 t\u00ecm \u0111\u01b0\u1ee3c d\u1ea5u c\u1ee7a s\u1ed1 c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i l\u1edbn h\u01a1n<\/i>)<\/b><\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Thay x = 25 v\u00e0o bi\u1ec3u th\u1ee9c A = x + (-15) ta \u0111\u01b0\u1ee3c:<br\/>$\\begin{align*}A&= 25 + (-15) \\\\A&= (25 - 15)\\\\A&= 10\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A = 10<\/span><\/span> <br\/>","column":2}]}],"id_ques":1055},{"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 gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c:<br\/>A = x + (-15) + 80 , bi\u1ebft x = 20","select":["A = -85","A = 85","A = 115","A = -115"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: Thay gi\u00e1 tr\u1ecb c\u1ee7a x v\u00e0o bi\u1ec3u th\u1ee9c A<br\/>B\u01b0\u1edbc 2: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c A <br\/>(<i><b>L\u01b0u \u00fd:<\/b> \u00c1p d\u1ee5ng t\u00ednh ch\u1ea5t giao ho\u00e1n, t\u00ednh ch\u1ea5t k\u1ebft h\u1ee3p c\u1ee7a ph\u00e9p c\u1ed9ng c\u00e1c s\u1ed1 nguy\u00ean \u0111\u1ec3 nh\u00f3m c\u00e1c c\u1eb7p c\u00f3 t\u1ed5ng b\u1eb1ng s\u1ed1 tr\u00f2n ch\u1ee5c, tr\u00f2n tr\u0103m, tr\u00f2n ngh\u00ecn,... \u0111\u1ec3 t\u00ednh nhanh<\/i>)<\/b><\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Thay x = 20 v\u00e0o bi\u1ec3u th\u1ee9c A = x + (-15) + 80 ta \u0111\u01b0\u1ee3c:<br\/>$\\begin{align*}A&= 20 + (-15) + 80\\\\A&= (20 + 80) + (-15)\\\\A&= 100 + (-15)\\\\A&= (100 - 15)\\\\A&= 85\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A = 85<\/span><\/span> <br\/>","column":2}]}],"id_ques":1056},{"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 gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c:<br\/>A = x + 34 + (-30) , bi\u1ebft x = -70","select":["A = -65","A = -66","A = 134","A = -134"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>B\u01b0\u1edbc 1: Thay gi\u00e1 tr\u1ecb c\u1ee7a x v\u00e0o bi\u1ec3u th\u1ee9c A<br\/>B\u01b0\u1edbc 2: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c A <br\/>(<i><b>L\u01b0u \u00fd:<\/b> \u00c1p d\u1ee5ng t\u00ednh ch\u1ea5t giao ho\u00e1n, t\u00ednh ch\u1ea5t k\u1ebft h\u1ee3p c\u1ee7a ph\u00e9p c\u1ed9ng c\u00e1c s\u1ed1 nguy\u00ean \u0111\u1ec3 nh\u00f3m c\u00e1c c\u1eb7p c\u00f3 t\u1ed5ng b\u1eb1ng s\u1ed1 tr\u00f2n ch\u1ee5c, tr\u00f2n tr\u0103m, tr\u00f2n ngh\u00ecn,... \u0111\u1ec3 t\u00ednh nhanh<\/i>)<\/b><\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Thay x = -70 v\u00e0o bi\u1ec3u th\u1ee9c A = x + 34 + (-30) ta \u0111\u01b0\u1ee3c:<br\/>$\\begin{align*}A&= (-70) + 34 + (-30)\\\\A&= [(-70) + (-30)] + 34\\\\A&= [-(70 + 30)] + 34\\\\A&= (-100) + 34\\\\A&= - (100 - 34)\\\\A&= -66\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A = -66<\/span><\/span> <br\/>","column":2}]}],"id_ques":1057},{"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":[[["0"," 0"," 0"," 0 "," 0 "]]],"list":[{"point":5,"width":60,"type_input":"","ques":"T\u1ed5ng c\u00e1c s\u1ed1 nguy\u00ean c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 8 l\u00e0: _input_","hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> B\u01b0\u1edbc 1: T\u00ecm c\u00e1c s\u1ed1 nguy\u00ean c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 8<br\/>B\u01b0\u1edbc 2: T\u00ednh t\u1ed5ng c\u00e1c s\u1ed1 v\u1eeba t\u00ecm \u0111\u01b0\u1ee3c \u1edf b\u01b0\u1edbc 1<br\/><b>L\u01b0u \u00fd:<i> Hai s\u1ed1 nguy\u00ean \u0111\u1ed1i nhau c\u00f3 t\u1ed5ng b\u1eb1ng 0.<\/i><\/b><\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>C\u00e1c s\u1ed1 nguy\u00ean c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 8 l\u00e0:<br\/> -7; -6; -5; ...; 5; 6; 7<br\/>T\u1ed5ng c\u00e1c s\u1ed1 nguy\u00ean c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 8 l\u00e0:<br\/>$\\begin{align*}&(-7) + (-6) + (-5) + ... + 5 + 6 + 7\\\\&= [(-7) + 7] + [(-6) + 6] + [(-5) + 5] + ... + 0 \\\\&= 0 + 0 + 0 + ... + 0\\\\&= 0 \\end{align*}$<\/span> <br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> 0<\/span> "}]}],"id_ques":1058},{"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":[[["0"," 0"," 0"," 0 "," 0 "]]],"list":[{"point":5,"width":60,"type_input":"","ques":"T\u1ed5ng c\u00e1c s\u1ed1 nguy\u00ean c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 4 l\u00e0: _input_","hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> B\u01b0\u1edbc 1: T\u00ecm c\u00e1c s\u1ed1 nguy\u00ean c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 4<br\/>B\u01b0\u1edbc 2: T\u00ednh t\u1ed5ng c\u00e1c s\u1ed1 v\u1eeba t\u00ecm \u0111\u01b0\u1ee3c \u1edf b\u01b0\u1edbc 1<br\/><b>L\u01b0u \u00fd:<i> Hai s\u1ed1 nguy\u00ean \u0111\u1ed1i nhau c\u00f3 t\u1ed5ng b\u1eb1ng 0.<\/i><\/b><\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>C\u00e1c s\u1ed1 nguy\u00ean c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 4 l\u00e0:<br\/> -3; -2; -1; 0; 1; 2; 3<br\/>T\u1ed5ng c\u00e1c s\u1ed1 nguy\u00ean c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 4 l\u00e0:<br\/>$\\begin{align*}&(-3) + (-2) + (-1) + 0 + 1 + 2 + 3\\\\&= [(-3) + 3] + [(-2) + 2] + [(-1) + 1] + 0\\\\&= 0 + 0 + 0 + 0\\\\&= 0 \\end{align*}$<\/span> <br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> 0<\/span> "}]}],"id_ques":1059},{"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":[[["0"," 0"," 0"," 0 "," 0 "]]],"list":[{"point":5,"width":60,"type_input":"","ques":"T\u1ed5ng c\u00e1c s\u1ed1 nguy\u00ean c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 3 l\u00e0: _input_","hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> B\u01b0\u1edbc 1: T\u00ecm c\u00e1c s\u1ed1 nguy\u00ean c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 3<br\/>B\u01b0\u1edbc 2: T\u00ednh t\u1ed5ng c\u00e1c s\u1ed1 v\u1eeba t\u00ecm \u0111\u01b0\u1ee3c \u1edf b\u01b0\u1edbc 1<br\/><b>L\u01b0u \u00fd:<i> Hai s\u1ed1 nguy\u00ean \u0111\u1ed1i nhau c\u00f3 t\u1ed5ng b\u1eb1ng 0.<\/i><\/b><\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>C\u00e1c s\u1ed1 nguy\u00ean c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 3 l\u00e0:<br\/> -2; -1; 0; 1; 2<br\/>T\u1ed5ng c\u00e1c s\u1ed1 nguy\u00ean c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 3 l\u00e0:<br\/>$\\begin{align*}&(-2) + (-1) + 0 + 1 + 2\\\\&= [(-2) + 2] + [(-1) + 1] + 0\\\\&= 0 + 0 + 0\\\\&= 0 \\end{align*}$<\/span> <br\/>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> 0<\/span> "}]}],"id_ques":1060}],"lesson":{"save":0,"level":1}}