Question

Efetue as operações:​

Answer 1

$- 3 + 4 = 1$

$+ 7 - 5 = 2$

- 8 + 10 - 12 + 15 = 5

- 7 + 3 + 10 - 8 = -2

- 3.(-8 -4) = 36

4.( -4 + 1) = -12

- 8 - (- 9) = 1

Answer 2

c) -8+10-12+15

-8-12= -20

+10+15= +25

25-20=5