=-25*35+(-25)*147+35*25+35*147
=-25*35+35*25+(-25)*147+35*147
=147*(-25+35)
=147*10
=1470

-25x[35+147]+35x[25+147]

= [-25+25]x[35+35]+[147+147]

=0x70+294

=0+294

=294

a) \(37\times46+37\times51+111\)

\(=37\times46+37\times51+37\times3\)

\(=37\times\left(46+51+3\right)\)

\(=37\times100\)

\(=3700\)

b) \(35\times215-35\times210-175\)

\(=35\times215-35\times210-35\times5\)

\(=35\times\left(215-210-5\right)\)

\(=35\times0\)

\(=0\)

c) \(172\times47+86\times8-34\times4\)

\(=4\times\left(43\times47+86\times2-34\right)\)

\(=4\times\left(2021+172-34\right)\)

\(=4\times2159\)

\(=8636\)

d) \(48\times56+28\times104\)

\(=48\times56+56\times52\)

\(=56\times\left(48+52\right)\)

\(=56\times100\)

\(=5600\)

Sửa lại đầu bài nha bạn :

-25 ( 35 + 47 ) + 35 ( 25 + 47 )

= - 25 x 35 + ( -25 ) x 47 + 35 x 25 + 35 x 47

= [ -25 x 35 + 35 x 25 ] + [ -25 x 47 + 35 x 47]

= 0 + [ ( -25 + 35 ) x 47 ]

= 0 + 10 x 47

= 470

-25. (35+47)+35.(25+147)

= (-25).35+(-25).47+35.25+35.147

= [(-25).35+35.25]+[(-25).47+35.147]

=                0          +  [(-1175)+5145]

=                0           +          3970

= 3970

a)85.(35-27)-35.(85-27)

=85.35-27-35.85-27

=(85-85).(35-35).(27-27)

=0.0.0

=0

b)47.(45-15)-47.(45+15)

=47.45-15-47.45+15

=(47-47).(45-45).(15+15)

=0.0.30

=0

a) - 1350

b) - 141o

a) 85 . ( 35 - 27 ) - 35 . ( 85 - 27 )

= 85 . 35 - 85 . 27 - 35 . 85 + 35 . 27

= ( 85 . 35 - 35 . 85 ) - 27 . ( 85 - 35 )

= 0 - 27 . 50

= 0 - 1350

= -1350

b) 47 . ( 45 - 15 ) - 47 . ( 45 + 15 )

= 47 . ( 45 - 15 - 45 - 15 )

= 47 . (-30)

= -1410

Học tốt !!!

=))

a) 5.            b)   0.         

c ) − 2 11 d ) 1 5        

 e)  0.

1, 69. (-74) - 31 . 74

= (-69) . 74 - 31 . 74

= 74(-69 - 31)

= 74(-100)

= -7400

2, (-2020) . 35 - 2020 . 65

= 2020 . (-35) - 2020 . 65

= 2020(-35 - 65)

= 2020(-100)

= -202000

3, -23 . 59 - 159 . 23

= 23 . (-59) - 159 . 23

= 23(-59 - 159)

= 23 . (-218)

= -5014

4, -147 . 47 + (-47)(-47) - 300

= -147 . 47 + 47 . 47 - 300

= 47(-147 + 47) - 300

= 47 . (-100) - 300

= -4700 - 300

= -5000

5, (-72) . 30 - 31 . (-30) + 3 + 30

=  (-72) . 30 + 31 . 30 + 3 + 30

= 30(-72 + 31 + 1) + 3

= 30 . (-40) + 3

= -1200 + 3

= -1197

6, (-82)(-55) + (-82) + (-46)(-82)

= (-82)(-55 + 1 - 46)

= (-82)(-100)

= 8200

7, (-41) . 135 + 135 . (-24) - 35 . (-65)

= 135(-41 - 24) - 35(-65)

= 135(-65) - 35(-65)

= (-65)(135 - 35)

= -65(100)

= -6500

10, 125 . (-88)

= 1000 . \(\frac{1}{8}\) . (-88)

= 1000 . (-11)

= -11000

Câu 8 với 9 mình ko hiểu nên ko giúp bn được 

Chúc bạn học tốt!

ad ko biết nha

nhân hết ra là xong nha 

a)  85x35-85x27-35x85+35x27=27x(35-85)=-1350

mấy cái kia cũng tương tự v 

_Kudo_

=85.35-85.27-35.85+35.27

=85.35+85.(-27)-35.85+35.27

=85[35+(-27)+(-35)]+35.27

=85.(-27)+35.27

=-85.27+35.27

=27.[(-85)+35]

=27.(-50)

=-1350

\(\frac{-35}{47}-\left(\frac{25}{13}-\frac{35}{47}\right)+\frac{12}{13}\)

\(=\frac{-35}{47}-\frac{25}{13}+\frac{35}{47}+\frac{12}{13}\)

\(=\left(\frac{-35}{47}+\frac{35}{47}\right)+\left(\frac{-25}{13}+\frac{12}{13}\right)\)

\(=0-1\)

\(=-1\)

_Chúc bạn học tốt_

\(\frac{-35}{47}-\left(\frac{25}{13}-\frac{35}{47}\right)+\frac{12}{13}\)

=\(\frac{-35}{47}-\frac{720}{611}+\frac{12}{13}\)

=\(-1\)

        \(-\frac{35}{47}-\left(\frac{25}{13}-\frac{35}{47}\right)+\frac{12}{13}\)............ k cho mik nhé!  ...............

\(=\)\(-\frac{35}{47}-\frac{25}{13}+\frac{35}{47}+\frac{12}{13}\)

\(=-\frac{35}{47}+\frac{35}{47}-\frac{25}{13}+\frac{12}{13}\)

\(=-\frac{25}{13}+\frac{12}{13}\)\(=-\frac{13}{13}=-1\)

35² + 47² - 18² + 70 x 47

= (35² + 47² + 2 x 35 x 47) - 18² 

= (35 + 47)² - 18²

= 82² - 18² = (82 - 18)(82 + 18) = 64 x 100 = 6400