25.(32+47)-32.(25+47)

= 25.32 + 47.25 - 32.25 +47.32

= 32,(25-25) + 47.(25-32)

= 47.(-7)

= -329

=25.79-32.72

=1975-2304

=-329

25.(32+47)+32.(25-47)

= -(25.32+25.47)+(32.25-32.47)

= -25.32+32.47 + 32.25-32.47

= (-25.32+32.25)-(25.47+32.47)

= 0 - 47.(25+32)

= -47.57

= -2649

Đề:25.(32-47)-32.(25-47)

=25.(-15)-32.(-22)

=-375-(-704)

=329

Dấu . là nhân nha

\(25\cdot\left(32-47\right)-32\cdot\left(25-47\right)=25\cdot32-25\cdot47-32\cdot25+32\cdot47=\left(25\cdot32-32\cdot25\right)+\left(32\cdot47-25\cdot47\right)=0+47\cdot\left(32-25\right)\)

\(=47\cdot7=409\)

Bài 1: 

=-3752-29+3632-51

=-120-80=-200

Bài 2:

b: \(=-25\cdot47+25\cdot32-25\cdot32+32\cdot47=47\cdot7=329\)

a.

\(-\left(-315\right)+\left(-115\right)-105+25=315-115-105+25=120\)

b.

\(888-\left(-333\right)-222+70=888+333-222+70=1069\)

c.

\(25\times\left(32+47\right)-32\times\left(25+47\right)=25\times32+25\times47-32\times25-32\times47=-47\times\left(32-25\right)=-47\times7=-329\)

2 ) tính nhanh : 

4524 - ( 864 - 999 ) - ( 36 + 3999 )

=  4524 - 864 + 999 - 36 - 3999 

=   4524 + ( -864 - 36 ) + ( 999 - 3999 )

=   4524 +     ( -900 ) +   (  -3000 ) 

=   -3624  +    -3000 

=    -6624 

a/ 25 x ( 32 + 47 ) - 32 x ( 25 + 47 )

= 25 x 79 - 32 x 72

= 1975 - 2304

= -329

b/ 48 x ( 21- 19 ) - 21 x ( 48 - 19 ) + 27 x ( -81 )

= 48 x 2 - 21 x 29 + 27 x ( -81 )

= 96 - 609 + -2187

= -2700

cau co phai vu phuong huyen ko.Neu phai thi cau hay vao ket ban voi to

a) 25.(32+47)-32.(25+47)

=25.32+25.47-32.25+32.47

=32.(25-25-47)+25.47

=32.(-47)+25.47

=47.((-32)+25)

=47.(-7)

=-329.

b) làm tương tự phần a bạn nha.