a) 29.(85-47)+85.(47-29)= 29.85-29.47+85.47-85.29
                                   =(29.85-85.29) -29.47+85.47
                                   =0-29.47+85.47
                                   = -29.47+85.47
                                   = (-29+85).47
                                   =56.47
                                   = 2632     
b)47.(23+50)-23.(47+50)= 47.23+47.50-23.47+23.50
                                  =(47.23-23.47)+47.50+23.50
                                  =0+47.50+23.50
                                  =47.50+23.50       
                                  =(47+23).50
                                  =70.50
                                  =3500
tích ^.^ ~

a) 29.(85-47)+85(47-29)

=29.38+85.18

=1102+1520

=2622

b)47.(23+50)-23.(47+50)

=47.73-23.97

=3431-2231

=1200

k mình nha...^_^...kb nữa... thanks

\(47\left(23+50\right)-23\left(47+50\right)=47.23+47.50-23.47-23.50=50\left(47-23\right)=1200\)

\(85\left(35-47\right)-35\left(85-27\right)=85.35-85.47-85.35+35.27=35.27-85.47=-3050\)

47.(23+50)-23.(47-50)=

47.73-23.-3 =

1081-23.-3 =

1058-3 =

1055

47.(23+50)-23.(47-50)

=(47.73)-23.(-3)

=3431-(-69)

=3431+69

=3500

dễ vồn ..

    bằng 1200 bạn ak .. check mk nhé
 

47 x (23+50)-23x(47+50)

=47 x 73 - 23 x 97

=(97-47)x(73-23)

=50 x 50

=2500

 mình sai rùi!!!

ủng hộ nha

Cam on cau tra loi cua cac ban. Ai biet cach lam nho giup minh nhe,minh se h cho

1. -11200

2. -378900

3. -11200

4. 1200

-11200

-378900

-11200

-69

a)   (-4 ). 112 . 25

= ( -4 . 25).112

= -100 . 112

= -11200 ( trừ 11 nghìn 200 )

47.(23+50)-23.(47+50)

=47.23+47.50-23.47-23.50

=47.50-23.50

=50.(47-23)

=50.24=1200

47.(23+50)-23.(47+50)

= 47.23+47.50-23.47+23.50

= 47.50-23.50

= 50.(47-23)

=50.24

=5024

chúc bạn học tốt nhé

\(47.\left(23+50\right)-23.\left(47+50\right)\)

\(=47.73-23.97\)

\(=3431-2231\)

\(=1200\)

bn ko có máy tính cầm tay à

nguyen son dong minh ko bk trinh bay ban nhé

  47.(23 + 50 ) - 23.( 47 + 50)

= 47.  23 + 47.50 - 23.47 + 23.50

= ( 47.23 - 23.47 ) +47.50 + 23.50

= 0 + 47.50 + 23.50

= 50. ( 47 + 23 )

= 50.70

= 3500

hok tốt

47 x ( 28 + 50 ) - 23 x ( 47 + 50 )

= 47 x 28 + 50 x 47 - 23 x 47 - 50 x 23

= ( 47 x 28 - 23 x 47 ) + ( 50 x 47 - 50 x 23 )

= 47 x 5 + 50 x 24 = 235 + 1200 = 1435

Ai ko k mình thì bạn đó hư

47 x ( 28 + 50 ) - 23 x ( 47 + 50 ) 

= 47 x 78 - 23 x 97

= 3666 - 2231

= 1435

47 x ( 28 + 50 ) - 23 x ( 47 + 50 )

= 47 x 78 - 23 x 97

= 3666 - 2231

1/ (-56) + 8.(11 + 7) = (-56) + 8.11 + 56 = 8.11 = 88

2/ 47.(23 + 50) - 23.(47 + 50) = 47.23 + 47.50 - 23.47 - 23.50

   = 47.(23 - 23) + 50.(47 - 23)

   = 0 + 50.24 = 1200

1)-56+8x(11+7)=88

2)47x(23+50)-23x(47+50)=1200

1)=-56+8.11+8.7

=(-56+56)+88

=88

2)=47.23+47.50-23.47-23.50

=(47.23-23.47)+(47.50-23.50)

=23(47-47)+50(47-23)

=0+50.24

=1200