Question

1)calcule
a) +5 +3 =
b) -4 -2 =
c) +6 +9 =
d) -8 -12=

2)efetue:
a) (+3) + (+2) =
b) (+7) + (+5) =
c) (-22) + (-19) =
d) (-25) + (-25) =

Answer 1

1a)+8
b) -6
c)+15
d)-20

2a)+5
b) +12
c)-41
d)-50