Question

Calculați:
a) -2-[-2-(-2+4)]-(-4-3)
b) 3-7+5)-(-12+5-7)
c) (7+8-9)-(2-5+8)-(-2-9+5)
d) (-35+18-24)-(8-14+10)-(-35+18)

Answer 1

a)

-2-[-2-(-2+4)]-(-4-3)=-2-(-2-2)-(-7)=-2-(-4)+7=-2+4+7=2+7=9

b)

(3-7+5)-(-12+5-7)=(-4+5)-(-7-7)=1-(-14)=1+14=15

c)

(7+8-9)-(2-5+8)-(-2-9+5)=(15-9)-(-3+8)-(-11+5)=6-5-(-6)=6-5+6=1+6=7

d)

(-35+18-24)-(8-14+10)-(-35+18)=(-17-24)-(-6+10)-(-17)=-41-4+17=-45+17=-28