4332 + 6321 - 3053

= 10653 - 3053

= 7600

ủng hộ nha bn!

57 x 76 + 43 x 147 - 43 x 71

=57x76+43.(147-71)

=57x76+43x76

=(57+43)x76=100x76=7600

57 x 76 + 43 x 147 - 43 x 71 

= 4332 + 6321 - 3053

= 10653 - 3053

= 7600

e)x-43=(57-x)-50. 

Suy ra x-43=57-x-50=57-50-x=7-x

Suy ra x-43+x=7. suy ra2x=7+43=50

Nên x=50:2=25

f)-(x-3+84)=(x+70-71)-5.

Suy ra -x+3-84=x-1-5=x-6

Suy ra -x-81=x-6. suy ra -x-81+6=x.suy ra-x-75=x

Suy ra -x-x=75 nên -2x=75 suy ra x=-75/2=-37.5

g)2(x-23)-(x-43)=96-115.

Suy ra 2x-46-x+43=-19,

suy ra 2x-x-46+43=-19,

suy ra x-3=-19

Nên x=-19+3=-16

h)2(x-12)+13=x+(-14)=x-14.

Suy ra 2x-24+13=x-14,

suy ra 2x-11=x-14,

suy ra 2x-11+14=x=2x+3,

suy ra x-2x=3 nên -x=3

vậy x=-3

e)x=25

f)x=-37,5

g)x=-16

h)x=-3

e)x-43=(57-x)-50. Suy ra x-43=57-x-50=57-50-x=7-x

                          Suy ra x-43+x=7. suy ra2x=7+43=50

                          Nên x=50:2=25

f)-(x-3+84)=(x+70-71)-5. Suy ra -x+3-84=x-1-5=x-6

                                    Suy ra -x-81=x-6. suy ra -x-81+6=x.suy ra-x-75=x

                                     Suy ra -x-x=75 nên -2x=75 suy ra x=-75/2=-37.5

D

\(\left(57-289\right)-\left(76-289\right)+\left(176+43\right)\)

\(=\) \(\left(-232\right)\) \(-\) \(\left(-213\right)\) \(+\) \(219\)

\(=\) \(\left(-19\right)+219\)

\(=200\)

(57 - 289 ) - ( 76 - 289 ) + ( 176 + 43 )

= 57 - 289 - 76 +289 +176 +43

= (57 + 43 ) + ( -289 +289 ) + ( - 76 + 176 )

= 100 +100

=200

( 57 - 289 ) - ( 76 - 289 ) + ( 176 + 43 )=200

tick mình nah mọi ngừoi

57 x 76 + 13 x 57 + 11 x 57

= 57 x ( 76 + 11 + 13 )

= 57 x 100

= 5700

57 x 76 + 13 x 57 + 11 x 57

=  57 ( 76 + 13 + 11 )

= 57 x 100

= 5700

57x76+13x57+11x57

=57x(76+13+11)

=57x100

=5700

help meeeeeeeee

Thanh vân : 

76 x 56 + 76 x 43 + 76

= 76x ( 56 + 43 + 1 )

= 76 x 100

= 7600

= 76x(56+43)                                               

= 76x99

=7524                                                             

\(a,30\cdot6+30\cdot71+20\cdot30\)

=\(30\cdot\left(6+71+20\right)\)

=\(30\cdot97=2910\)

\(b,24\cdot\left(31+119\right)+76\cdot\left(29+121\right)\)

=\(24\cdot150+76\cdot150\)

=\(150\cdot\left(24+76\right)\)

=\(150\cdot100\)

=\(15000\)

\(c,87\cdot23+70\cdot87+43\cdot93\)

=\(87\cdot\left(23+87\right)+43\cdot93\)

=\(87\cdot110+3999\)

=\(9570+3999\)

=13569

a) 15 . 6 . 2 + 3 . 71 . 10 + 20 . 30 

= ( 15 . 2 ) . 6 + ( 3 . 10 ) . 71 + 20 . 30

= 30 . 6 + 30 . 71 + 20 . 30 

= 30 . ( 6 + 71 + 30 ) 

= 30 . 107

= 3210

b) 24 . 31 + 24 . 119 + 76 . 29 + 76 . 121 

= 24 . ( 31 + 119 ) + 76 . ( 29 + 121 )

= 24 . 150 + 76 . 150 

= 150 . ( 24 + 76 ) 

= 150 . 100 

= 15 000

c) 87 . 23 + 43 . 93 + 70 . 87 

= 87 . 23 + 70 . 87 + 43 . 93 

= 87 . ( 23 + 70 ) + 43 . 93 

= 87 . 93 + 43 . 93 

= 93 . ( 87 + 43 ) 

= 93 . 130 

= 12 090

a) 15 . 6 . 2 + 3 . 71 . 10 + 20 . 30

= 30 . 6 + 30 . 71 + 30 . 20

= 30 . (6 + 71 + 20) = 30 . 97 = 2910

b) 24 . 31 + 24 . 119 + 76 . 29 + 76 . 121

= 24 . (31 + 119) + 76 . (29 + 121)

= 24 . 150 + 76 . 150 = 150 . (24 + 76)

= 150 . 100

= 15000

c) 87 . 23 + 43 . 93 + 70 . 87

= 43 . 93 + 87 . (23 + 70)

= 43 . 93 + 87 . 93

= 93 . (43 + 87)

= 93 . 130

= 12090