35.18 - 5.7.28 = 35 ( 18 - 28 ) = -350

35x18-(5x7)x18 còn đâu bạn tự tính

35.18 - 5.7.28

= 35.18 - 35.28

= 35 . ( 18 - 28 ) 

= 35 . ( -10 ) 

= -350 

   35.18-5.7.28

=35 .18-35.28

=35.(18-28)

=35.(-10)

= -350

   45-5.(12+9)

=45-5.12-5.9

=5.9-5.12-5.9

=5.(9-12-9)

=5.(-12)

=-60

  24.(16-5)-16.(24-5)

=24.16-24.5-16.24+16.5

= (24.16-16.24)-(24.5-16.5)

=           0       -   5.(24-16)

=           0       -   5.8

=           0       -   40

=                 -40

35.18-5.7.28

=35.18-35.28

=35.(18-28)

=35.(-10)

=-350

45-5.(12+9)

=5.9-5.12-5.9

=0-60

=-60

24.(16-5)-16.(24-5)

=24.16-24.5-16.24+16.5

=(24.16-16.24)+(24.5+16.5)

=0-5.(24-16)

=0-5.8

=0-40

=-40

A=35.18-35.28 =35.(18-28)=35.(-10)=-350

B=45-5.21=45-105=-60

C=-40

K NHA

35.18-5.7.28

=35.18-35.28

=35.(18-28)

=35.(-10)

=-350

-350

duyệt đi

35.18-5.7.28

=35.18-35.28

=35(18-28)

=35.(-10)

=-350

Chọn B

35.18 − 5.7.28 = 35.18 − 35.28 = 35. 18 − 28 = 35. − 10 = − 350

35.18-5.7.28

=35.18-35.28

=35.(18-28)

=35.(-10) =-350

35.18 - 5.7.28

=35.18- 35.28

=35.(18-28)

=35. (-10)

= -350

45-5.(12+9

=45+(-60-45)

=45-60-45

=45-45-60

=0-60

= -60

35.18—5.7.28

=35.18—35.28

=35.(18—28)

=35.(—10)

=—350

45—5.(12+9)

=45—5.12+5.9

=45—60+45

= 30

24.(16—5)—16.(24—5)

=24.16—24.5—16.24—16.5

=24.(16—5—16)—16.5

=24.(—5)—16.5

=(—24).5—16.5

=[(—24)—16].5

= —40.5

=—200

35.18-5.7.28

=35.18-35.28

=35.(18-28)

=35.(-10)

=-350

45-5.(12+9)

=45-5.12+5.9

=45-60+45

=45-45+60

=30

24.(16-5)-16. (24-5)

=24.16-24.5-16.24-16.5

=(24.16-16.24)-24.5-16.5

=0-120-80

=-200

tk nhess

1)  \(35.18-5.7.28=35.18-35.28=35\left(18-28\right)=-350\)

2)  \(45-5\left(12+9\right)=45-60-45=-60\)

3)  \(24\left(16-5\right)-16\left(24-5\right)=24.16-24.5-16.24+16.5=5\left(16-24\right)=5.8=40\)

4)  \(29\left(19-13\right)-19\left(29-13\right)=29.19-29.13-19.29+19.13=13\left(19-29\right)=-130\)

5)  \(31.\left(-18\right)+31.\left(-81\right)-31=-31.\left(18+81+1\right)=-3100\)

6)  \(\left(-12\right).47+\left(-12\right).52+\left(-12\right)=\left(-12\right)\left(47+52+1\right)=-1200\)

7)  \(13\left(23+22\right)-3\left(17+28\right)=13.45-3.45=45.\left(13-3\right)=450\)

8)  \(-48+48.\left(-78\right)+48.\left(-21\right)=-48\left(1+78+21\right)=-4800\)

1) 35.18 - 5.7.28

= 35.18 - 35.28

= 35.(18 - 28)

= 35.(-10)

= -350

2) 45 - 5.(12 + 9)

= 45 - 5.12 - 5.9

= 45 - 60 - 45

= (45 - 45) - 60

= 0 - 60

= -60

3) 24.(16 - 5) - 16.(24 - 5)

= 24.16 - 24.5 - 16.24 + 16.5

= (24.16 - 16.24) - (24.5 + 16.5)

= 0 - (24.5 + 16.5)

= -24.5 + 16.5

= 5.(-24 + 16)

= 5.(-8)

= -40

4) 29.(19 - 13) - 19.(29 - 13)

= 29.19 - 29.13 - 19.29 + 19.13

= (29.19 - 19.29) + (19.13 - 29.13)

= 0 + (19.13 - 29.13)

= 19.13 - 29.13

= 13.(19 - 29)

= 13.(-10)

= -130

5) 31.(-18) + 31.(-81) - 31

= 31.(-18 - 81 - 1)

= 31.(-100)

= -3100

6) (-12).47 + (-12).52 + (-12)

= (-12).(47 + 52 + 1)

= (-12).100

= -1200

7) 13.(23 + 22) - 3.(17 + 28)

= 13.45 - 3.45

= 45.(13 - 3)

= 45.10

= 450

8) -48 + 48.(-78) + 48.(-21)

= 48.(-1) + 48.(-78) + 48.(-21)

= 48.(-1 - 78 - 21)

= 48.(-100)

= -4800

Cố gắng lên nhé em Hoàng Mai Hoa

1)35.18-5.7.28

= 35 . 18 - 35 . 28

= 35 . ( 18 - 28 )

= 35 . ( - 10 )

= - 350