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2.18.14 + 3.12.17 - 4.31.9
= 36.14 + 36.17 - 36.31
= 36. (14+17-31)
= 36. 0 =0
2.18.14 + 3.12.17-4.31.9
=36.14+36.17-36.31
=36.(14+17-31)
=36.0
=0
Chúc bạn học tốt , cho mik 1 tick nha
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a: \(72\cdot56+56\cdot28=56\left(72+28\right)=5600\)
b: \(53\cdot125-24\cdot53-53=53\left(125-24-1\right)=5300\)
c: \(42\cdot53+47\cdot156-47\cdot114=42\cdot53+47\cdot42=4200\)
d: \(28\cdot76+28\cdot25+28=28\cdot\left(76+25+1\right)=2800\)
e: \(37\cdot59-37\cdot3+37\cdot49=37\left(59-3+49\right)=3885\)
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a)2.18.14+3.17.12+4.69.9
=(2.18).14+(12.3).17+(4.9).69
=36.14+36.17+36.69
=36.(14+17+69)
=36.100
=3600
b)1+(-3)+5+(-7)+9+(-11)+13+(-15)
=[1+(-3)]+[5+(-7)]+[9+(-11)]+[13+(-15)]
=(-2)+(-2)+(-2)+(-2)
=(-8)
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sẵn tiện giúp em luôn nha :
( -17)+ 14+ (-12)
5 mũ 10 : 5 mũ 8 +60 : 12+(-10)
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a) 1,2.2,5 = 3;
125 : 0,25 = 500
b)
\(1,2.2,5 = \dfrac{6}{5}.\dfrac{5}{2} = \dfrac{{30}}{{10}} = 3\)
\(125:0,25 = 125:\dfrac{1}{4} = 125.4 = 500\)
![](https://rs.olm.vn/images/avt/0.png?1311)
2 x 18 x 14 + 3 x 17 x 12 + 4x 69 x 9
= (2 x 18) x 14 + ( 3 x 12) x 17 + (4 x 9) x 69
= 36 x 14 + 36 x 17 + 36 x 69
= 36 x (14 + 17 + 69)
= 36 x 100 = 3600
TICK CHO MÌNH NHA
2 .18 .14 + 3 .12.17- 4 .31. 9
= 504 + 612 - 1116
= 0
2 .18 .14 + 3 .12.17- 4 .31. 9= 504 + 612 - 1116= 0