Question

2.calcule o valor das expressões

a) 15+(-8. (+3)=

b)(-30):(-5)-(-4)=

c) 21-(-14):(+2)=

d) 3.(-8)-4.(-5)=

e) (-6).(+3)+(-15):(-5)=

Answer 1

a) 15 + ( - 24)
15 - 24 = - 9
b) + 6 - ( - 4)
+ 6 + 4 = + 10
c) 21 - ( - 7)
21 + 7 = + 28
d) - 24 + 20 = - 4
e) - 18 + 3= - 15