Question

bỏ ngoạc

a)-(23+17-64)-(-24)

b)(12+64-13)-(23-26-27)

Answer 1

a)-(23+17-64)-(-24)

=-23-17+64+24

=(-23-17)+(64+24)

=-40+88

=48

b)(12+64-13)-(23-26-27)

=12+64-13-23+26+27

=(12-23)+(64+26)-(13-27)

=-11+90+14

=79+14

=93

 

Answer 2

a)=-23-17+64+24
   =48
b)=12+64-13-23+26+27
   =35