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Chọn B
35.18 − 5.7.28 = 35.18 − 35.28 = 35. 18 − 28 = 35. − 10 = − 350
35 . 18 - 5 . 7 . 28
= 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
k minh nhe ban !
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
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)(-25).(-3).(-4)
= [ (-25) . (-4) ] .(-3)
= 100 . (-3) = -300
b)17-25+55-17
= (17-17) + (-25+55)
= 0 + 30 = 30
c)35.18-5.7.28
= 35 . 18 - 35 . 28
= 35 . (18-28)
= 35 . (-10)
= -359.
d, \(|-7|\)+ 2 . [ 24 : (-8) + (-5) 2)
= 7 + 2 . [ (-3) + 25 )
= 7 + 2. 22
= 7 + 44 = 51
Hok tốt !
a)(-25).(-3).(-4)
=75.(-4)
=-300
d)-|-17+2.[24:(-8)+(-5)2]
=-17+2.[-3+25]
=-17+2.22
=-17.44
=-748
35.18-5.7.28
=35.18-35.28
=35.(18-28)
=35.(-10) =-350
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) \(-48+48.\left(-78\right)+48.\left(-21\right)=-48\left(1+78+21\right)=-4800\)
35.18-5.7.28
=35.18-35.28
=35.(18-28)
=35.(-10)
=-350
-350
duyệt đi