Question

1.Tính

a, (-1).3+(-4)-7.0+1

b, (-1).(-2)+(-3).(-4)-(-2).(-3)

c, (-1).(-2).(-3).(-4).(-5):[(-3)-(-5)]

 

Answer 1

a, [ (- 1) . 3 ] + (- 4) - (7.0) + 1

= [- 3 + ( - 4 )] - 0 + 1

= - 7 - 0 + 1

= - 6

b, (-1).(-2)+(-3).(-4)-(-2).(-3)

= [(-1).(-2)] + [(-3).(-4)] - [(-2).(-3)]

= 2 + 12 - 6

= 8

c, (-1).(-2).(-3).(-4).(-5):[(-3)-(-5)]

= (-1).(-2).(-3).(-4).(-5) : 2

= - 120 : 2

= - 60

Chắc chắn đấy!

Answer 2

a, (-1).3+(-4)-7.0+1=-3-4-0+1=-6

b, (-1).(-2)+(-3).(-4)-(-2).(-3)=2+12-6=8

c, (-1).(-2).(-3).(-4).(-5):[(-3)-(-5)]=(-120):2=-60

Answer 3

a, (-1).3+(-4)-7.0+1=-3-4-0+1=-6

b, (-1).(-2)+(-3).(-4)-(-2).(-3)=2+12-6=8

c, (-1).(-2).(-3).(-4).(-5):[(-3)-(-5)]=-120:2=-60