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( -131 ) . ( -25 ) + ( -74 ) . 131 - ( -1 ) . 131
= 131 . 25 + ( -74 ) . 131 - ( -1 ) . 131
= 131 . [ ( 25 + ( -74 ) - ( -1 ) ]
= 131 . ( -50 )
= -6550
\(\left(-131\right)\left(-25\right)+\left(-74\right).131-\left(-1\right).131\)
\(=\left(-131\right)\left[\left(-25\right)+74-1\right]=\left(-131\right).48=-6288\)
![](https://rs.olm.vn/images/avt/0.png?1311)
( -215 + 131 + 57 ) - ( 131 - 215 +47 )
= -215 + 131 + 57 - 131 + 215 - 47
= ( -215 + 215 ) + ( 131 - 131 ) + ( 57 - 47 )
= 0 + 0 + 10
=10
mk giải xong rồi nhớ tick mk nha
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
12.( -131-25)+131.( 12+25)
= -12.131-12.25+131.12+131.25
= -12.25+131.25
= 25.( 131-12)
= 25.119
= 2975
#Châu's ngốc
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![](https://rs.olm.vn/images/avt/0.png?1311)
= -19.71+19.131-131.71+131.19
=-19.131+131.19+19.(-71)+131.(-71)
=0+-17.(19+131)
=-17. 150
= -10650
a: =-19*71+19*131-131*71+131*19
=-71*150+19*262
=-5672
b: =54*186-54*12-186*54-186*12
=-12*240
=-2880
![](https://rs.olm.vn/images/avt/0.png?1311)
\(A=131\cdot\left(35-27\right)-35\cdot31+131\cdot207\\ A=131\cdot35+131\cdot27-35\cdot31+131\cdot207\\ A=35\cdot\left(131-31\right)+131\cdot\left(27+207\right)\\ A=35\cdot100+131\cdot234\\ A=3500+30654=34154\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1)
-131-74+(-45)-(131)
=-131 - 74 - 45 - 131
=-381
2)
x-(-14)= -54
x + 14 = -54
x = -54 - 14
x =-68
135-(x-47)=23
x - 47 = 135 - 23
x - 47= 112
x= 112 + 47
x=159
-31.94-(-94).131
= -31 . 94 + 94 . 131
= ( -31 + 131 ) x 94
= 100 x 94
= 9400
Ta có
\(-31.94-\left(-94\right).131\)
\(=-31.94+94.131\)
\(=94.\left(-31+131\right)\)
\(=94.100\)
\(=9400\)
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