Question

1) Calcule:
a) – 23 + 25 =
b) – 43 + 47 =

2) Efetue:
a) 0 – (+7) =
b) –17 – (–14) =

Answer 1

Explicação passo-a-passo:

a) – 23 + 25

+2

b) – 43 + 47

+4

a) 0 – (+7)

0-7

-7

b) –17 – (–14)

-17+14

-3