1) Efetue as multiplicações
a) (+1/5) . (+4/3) =
b) (+4/9) . ( -7/5) =
c) (-3/2) . ( -5/7) =
d) (-1/5) . (+1/4) =
e) (+2/3) . (-1/3) =
f) (-5/8) . (-4/3) =
g) (+4/5) . (-1/3) =
h) (-3/5) . (-7/4) =
2) Efetue as multiplicações
a) (+3) . (-1/5) =
b) (+2) . (+4/11) =
c) (-1) . (-3/10) =
d) (-4/7) . (+5) =
e) (-2/5) . (-3) =
f) (+2/9) . 0 =
3) Efetue as multiplicações
a) (-1/2) . (+2/3) . (-3/7) =
b) (-2/5) . (-3/2) . (-8/5) =
c) (-1/2) . (-1/2) . (-1/2) =
d) (-1) . (+5/3) . (+3/5) =
e) (+7) . (-1/7) . (+7) =
4) Efetue as multiplicações:
a) (-2/3) . (+1/5) =
b) (-7/3) . (-3/7) =
c) (1/5) . (-7/3) =
d) (-2/9) . 5/7 =
e) (-3/4) . (-5/7) =
f) (-2) . (-1/6) =
g) 5 . (-4/7) =
h) -2 . (-1/3) =
5) Efetue as multiplicações:
a) (1/4 . 3/5) . 2/7 =
b) (2 – ¼) . (-2/3) =
c) (-3/4) . (+1/5) . (-1/2) =
d) 4. ( 1 – 7/5) =
e) (-3/5) . (-2) . (7/5) =
f) ( 1 – 4/5) . ( 1 – ½) =