Question

35 pontos
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06. Calcule:
a) (+12) + (+21) =
b) (+23) + (+21) =
c) (-12) + (-11) =
d) (-23) + (-4) =
e) (-21) + (- 12) =
f) (+10) + (- 13) =​

Answer 1

Resposta:

a) 12 + 21 = 33

b) 23 + 21 = 44

c) -12 -11 = -23

d) -23 -4 = -27

e) -21 -12 = -33

f) 10 -13 = -3

Answer 2

A 33

b 44

c -23

d - 27

e - 33

f - 3