Question

2. Elimine os parênteses quando necessário e resolva as operações:
a) ( + 20 ) – ( - 7 )=
b) ( - 25 ) + ( - 45 ) =
c) ( + 12 ) – ( - 9 ) + ( - 10 )=
d) + 15 – ( - 4) + ( - 12 ) =
e) 25 + ( + 5 ) – ( + 6 )=
f) ( - 18 ) – ( - 8 ) + ( + 5 ) =
g) – 8 + 15 =
h) – 18 + ( - 6 ) =
i) + 20 – 35 + ( - 5 ) =
j) + 18 – 3 + 7 =
k) ( -10 ) – 25 + 28 =
l) – 8 + 5 – ( +11 ) =
ajuda aí pfv

Answer 1

Resposta:

+20- -7= 27 b=-25 + -45=-70