a, [(-8) + (-7)] + 10
= (-15) + 10
= -5.
b, (-47).69+31.(-47)
= (-47) . ( 69 + 31 )
= (-47) . 100
= -4700.
a, [(-8) + (-7)] + 10
= (-15) + 10
= -5.
b, (-47).69+31.(-47)
= (-47) . ( 69 + 31 )
= (-47) . 100
= -4700.
Thực hiện phép tính
a)-3/5 + 1/4 + -3/10
b)1/5 + -9/10 + -7/25
c)31/23 - ( 7/32 + 8/23 )
Tính nhanh
a) (x-8).14-125
b) (-125).(-72).7
c) (-4).2.6.25-(-7).5
d) -310.87+(-310).13
e) 47.69-31.(-47)
f) 42.48-24.34
Bài 1 : Tính nhanh :
a) (-8).14.225
b) (-125).(-72).7
c) 47.69-31.(-47)
d) -4.2.6.25.(-7).5
e) -310.87+(-310).13
g) 42.48 -24.34
Giúp mình nha >_< !!!
a) 47.69-31.(-47)
Tính nhanh nha <3
a)-524. [23+(-45)+524.(-45+123)
b) 47.69-31.(-47)
c)16.(38-2)-38.(10.1
d)125.(-8).(-25).9.4.100^0 .3
) 47.69-31.(-47)
b) 16.( 38 -2 ) - 38.( 16 -1 )
c) (-41).( 59+2 ) + 59 .( 41 -2 )
d)125.(-8).(-25).9.4.1000 :3
a)-524 . [(23+(-45)]+524.(-45+123)
b)47.69-31.(-47)
c)16.(38-2)-38.(16-1)
d) (-41).(59+2)+59.(41-2)
e) 125.(-8).(-25).9.4.100^0 :3
Tính nhanh
47.69-31.(-47)
(-32).125.(-9).(-25)
-47.69+31.(-47)
25.11.(-15)-50.15.(-5)