Question

Calcule as somas: (com jogo de sinais)

a) (+2/5) + (-1/3) =

b) (-2/3) + (-5/6) =

c) (+3/5) + (-1/3) =

d) (+0,1) + (-1,1) + (0,11) =

2. Efetue as subtrações

a) (+2/5) - (+1/4)

b) (-5/8) + (+3/8)

c) (+1/4) - (-1/2)

d) (-0,54) - (-0,6)

e) (-1/4) - (-1/8)

f) (-4/5) - (+3,8)

Answer 1

1-
a) 1/15
b) 3/2
c) 4/15
d)0,89

2-
a) 3/20
b) 1/4
c) 3/4
d) 0,04
e) 1/8
f) 23/5