Lời giải:

$-54\times 76+12\times (-76)-76\times (-34)$

$=-54\times 76+(-12)\times 76+76\times 34$

$=76\times [(-54)+(-12)+34]=76\times (-32)=-2432$

a,16 X 50X-25X(-250)

=(16 X-25)X50X(-250)

=-400X50X-250

=-20000X-250

=5000000

b,-54X76+12X(-76)

=76X(-54-12)

=76X(-66)

=-5016

c,32X(-64)-64X68

=-64X(32+68)

=-64X100

=-6400

d,19X42.(-19)+38X5

=19X(42-1)+19X2X5

=19X41+19X10

=19X(41+10)

=19X51=969

a) 16.50.(-25).(-250)

=[16.(-25)].50.(-250)

=-400.50.(-250) 

=-20000.(-250) 

=5000000

b,-54.76+12.(-76)

=76.(-54-12)

=76.(-66)

=-5016

c,32.(-64)-64.68

=-64.(32+68)

=-64.100

=-6400

d,19.42.(-19)+38.5

=19.(42-1)+19.2.5

=19.(42-1)+19.(2.5)

=19.41+19.10

=19.(41+10)

=19.51

=969 

\(-54.76+12.\left(-76\right)-76.\left(-34\right)\)

\(=54.\left(-76\right)+12.\left(-76\right)-\left(-76\right).34\)

\(=-76.\left(54+12-34\right)\)

\(=-76.32\)

\(=-2432\)

-54*76+12*(-76)-76*(-34)

=(-4104)+(-912)-(-2584)

=-2429

k cho mk nhé

Bài 1: Tính

a) -54 x 76 + 12 x ( -76 )

= -4104 + (-912)

= -5016

b) ( 37 - 17 ) x ( -9 ) + 35 x ( -9 - 11 ) 

= 20 x ( -9 ) + 35 x ( -20 )

= - 180 + ( -150 )

= -600

Bài 2: Bỏ dấu ngoặc 

a) 24 x 5 - [ 131 - ( 13 - 4 ) x 2 ]

= 24 x 5 - [ 131 - 9 x 2 ]

= 24 x 5 - [ 131 - 18 ] 

= 24 x 5 - 113

= 120 - 113

= 7

b) 30 x { 175 : [ 355 - ( 135 + 37 x 5 )]}

= 30 x { 175 : [ 355 - ( 135 + 185 )]}

= 30 x { 175 : [ 355 - 320 ]}

= 30 x { 175 : 35 }

= 30 x 5

= 600

c) 160 - ( 23 x 25 - 6 x 25 )

= 160 - ( 575 - 150)

= 160 - 425

= -265

a,-5016

b,-880

c,-2250

=-54.76-12.76+76.34

=76(-54+12+34)

=76(-10)

=-760

-54.76+12.(-76)-76.(-34)=-54.76+12.76+76.34

=76.(-54+12+34)

=76.(-10)=-76

=76x(49+50+1)

=76x100

=7600

76 * (  49 + 50 + 1 )

= 76 * 100 

= 7600

\(=-76\left(54+12-36\right)=-76\cdot30=-2280\)

a) (-54).76 + 12.(-76) - 76.(-34)

= (-54).76 + (-12).76 - 76.(-34)

= 76. [(-54) + (-12) - (-34)]

= 76.    (-32)

= -2432

\(19.64+76.34\)

\(=1216+2584\)

\(=3800\)

Mình chỉ biết thế thôi !

19 . 64 + 76 . 34

= 1216 + 2584

= 3800