1. Calcule o valor das expressões, conforme o exemplo.
Exemplo: 60 – (+ 4) . (– 8) =
= 60 – (– 32) =
= 60 + 32 =
= 92
a) 6 . 7 – 30 =
b) 16 – 5 . 3 =
c) 32 – (– 6) . (– 3) =
d) (+ 16) . (– 4) + 64 =
2. Calcule as seguintes divisões e relacione as colunas:
a) (– 16) : ( – 2) = ( ) – 6
b) (+ 28) : ( – 4) = ( ) – 20
c) ( – 40) : ( + 2) = ( ) – 7
d) (+ 24) : ( + 4) = ( ) + 18
e) (+ 45) : ( – 5) = ( ) + 6
f) (– 27) : ( – 3) = ( ) – 9
g) (– 42) : ( + 7) = ( ) + 9
h) (– 36) : ( – 2) = ( ) + 8
3. Faça as multiplicações:
a) (+ 3) . (+ 8) =
b) (– 6) . (– 7) =
c) (– 2) . (– 5) =
d) (– 7) . (+ 8) =
e) (+ 9) . (– 2) =
f) (+ 2) . (– 6) =
g) (– 5) . (+ 9) =
h) (– 7) . (+ 7) =
i) 5 . (– 3) =
j) 4 . (– 8) =
k) 4 . (+ 9) =
l) (+ 6) . 0 =
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