3. Efetue as multiplicações.
a) (46) · (2) *
b) (6) · (– 2) *
c) (– 7) · (– 8) *
d) (– 9) · (2) *
e) (10) · (– 46) *
f) (– 72) · (1) *

4. Efetue as divisões.
a) (9) ÷ (– 9) *
b) (8) ÷ (4) *
c) (– 30) ÷ (– 6) *
d) (– 48) ÷ (16) *
e) (– 4) ÷ (1) *
f) (– 24) ÷ (– 6) *

5. Efetue as potenciações.
a) (5)² *
b) (– 8)² *
c) (6)³ *
d) (– 7)³ *
e) (– 9)¹ *
f) (– 11)² *