Question

Calcule os produtos

a) (+2) (+1)=
b)13×20
c)(+1) • (+1) • (+1) • (+1)
d) 31- (-9) • (-2)
e)(-4) (-7) - 12
f) (-7) • (+5) + 5​

Answer 1

a) 2 × 1 = 2.

b) 13 × 20 = 260.

c) 1 × 1 × 1 × 1 = 1.

d) 31 - (-9) × (-2)= 31 - 18 = 13.

e) -4 × (-7) - 12 = 28 - 12 = 16.

f) -7 × 5 + 5 = -35 + 5 = -30.