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

=47x23+47x50-23x47-23x50

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

=47x0-50x24

=0-1200

=-1200

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

=47x 23 +  47 x50 -23 x47 +23 x50

=0     

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

=47.23+47.50-23.47+23.50

=(47.23-23.47)+47.50+23.50

=(47.23-23.47)+(47+23).50

=0+70.50

=0+3500=3500.

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

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

\(=47.73-23.97\)

\(=3431-2231\)

\(=1200\)

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

nhiều quá mk phụ bạn chút thôi

a)47*(23+50)-23*(47+50)=47*23+47*50-23*47+23*50=(47*23-23*47)+(47*50+23*50)=(47+23)*50=70*50=3500

b)29*(85-47)+85*(47-29)=29*85-29*47+85*47-85*29=(29*85-85*29)+(85*47-29*47)=(85-29)*47=56*47=2632

c)37*90-37*(-10)=37*[90-(-10)]=37*100=3700

a. 47.[23+50]-23.[47+50]

=47.73-23.97

=3431-2231

=1200

b,29.[85-47]+85.[47-29]

=29.38+85.18

=1102+1520

=-428

c,37.90-37.[-10]

=37.(90-(-10))

=37.100

=3700

d,15.12-3.5.10

=15.12-15.10

=15.(12-10)

=15.2

=30

e,29.[19-13]-19.[29-13]

=29.6-19.16

=174-304

=-130

f,33.[17-5]-17.[33-5]

=33.12-17.32

=396-544

=-148

g,54-6.[17+9]

=54-6.26

=54-156

=-102

h,1000+[-570]+2341+[-430]

=430+2341+(-430)

=(-430+430)+2341

=0+2341

=2341

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 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

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

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

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