Question

Quanto é? (desenvolvimento das contas pf)
a) (-21 + 0) + (+12 + 7) + (-4 + 2)
b) (-790 -340) + (130+1.024)

Answer 1

a (-21)+(29)+(-2) = 6
b - (-1130)+1154) = 24

Answer 2

a)(-21 +0) + (+12+7) + ( -4 + 2)
-21 + 19 + -6
-3 + -6
-9

b)(-790 -340) + (130 + 1.024)
1.130 + 1.154
2.284