Question

A) 10-[-8+(-12)=
10-[-8-12]=
10-[-20]=

B) (-12):(-3)-(-5)×(+2)=
+4-(-10)=
+4+10=+10

C)-12+[(-7-3):(-2)]=
-12+[(-10):(-2)]=
-12+(+5)-12+5=-7

D)(-3+7):(-5+3)=
(+4):(-2)(+64):(+4)=16

E) (√81)×[-4+(-9: -3)]
9×[-4+(+3)]
9×[-4+3]
9×(-1)=-9.​

Answer 1

Resposta:

a) 30

b) 14

c)-14

d) 15,5

e) nao sei sorry