Question

1) Calcule:

a) + 6 + 9 = ________ e) – 50 + 50 = _________
b) + 10 + 7 = ________ f) – 50 – 50 = __________
c) – 10 – 15 = ________ g) + 50 + 50 = __________
d) + 20 – 3 =___________ h) – 60 – 20 = ___________

Answer 1

Resposta:

a15

b17

c5

d17

e0

f0

g100

h40