Question

14) Calcule as contas abalxos
a) +45 -30 =
b) (- 9) x (+ 12) =
C) (-32 ) + ( + 2) =
d) +7 + 13 =
e) (+ 9) x ( + 10) =​

Answer 1

Resposta:

a) 15

b) -108

c) -30

d) 20

e) 90