Question

Calcule as somas:

a) (–8) + (–4) =

b) (–10) + (–9) =

c) (+11) + (–3) =

d) (–15) + (+26) =

e) (+1) + (–8) =

f) (–19) + 0 =

g) (+5) + (–13) =

h) (–70) + (–9) =

i) (+15) + (–13) =

j) (–20) + (–19) =

k) (+28) + (+15) =

Answer 1

Explicação passo-a-passo:

a) -8-4= -12

b) -10-9= -19

c) 11-3= +8

d) -15+26= +11

e) 1-8= -7

f) -19+0= -19

g) 5-13= -8

h) -70-9= -79

i) 15-13= +2

j)-20-19= -39

k) 28+15= +43