a) (+3/5) + (+1/2) =
b) (-2/3) + (+5/4) =
c) (-4/9) + (+2/3) =
d) (-3/7) + (+2/9) =
e) (-1/8) + (-7/8) =
f) (-1/3) + (-1/5) =
g) (-1/8) + (5/4) =
h) (+1/5) + ( +3/5) =
2) Efetue as adições:
a) (-2/5) + 3 =
b) (-1/6) + (+2) =
c) (-5/3) + (+1) =
d) (-4) + (-1/2) =
e) (-0,2) + (-1/5) =
f) (+0,4) + (+3/5) =
g) (-0,5) + (+0,7) =
h) (-02) + (-1/2) =
3) Efetue as seguintes adições:
a) (+5/8) + (+1/2) + ( -2/15) =
b) (+1/2) + (-1/3) + (+1/5) =
c) (-1/2) + (-4/10) + (+1/5) =
d) (-3/5) + (+2) + (-1/3) =
4) Efetue as subtrações:
a) (+5/7) – (+2/3) =
b) (+2/3) – (+1/2) =
c) (+2/3) – (+4/5) =
d) (-7/8) – (-3/4) =
e) (-2/5) – (-1/4) =
f) (-1/2) – (+5/8) =
g) (+2/3) – ( (+1/5) =
h) (-2/5) – ( +1/2) =
5) Efetue as subtrações:
a) (+1/2) – (+5) =
b) (+5/7) – (+1) =
c) 0 – ( -3/7) =
d) (-4) – (-1/2) =
e) (+0,3) – (-1/5) =
f) (+0,7) – (-1/3) =
6) Calcule
a) -1 – ¾ =
b) (-3/5) + (1/2) =
c) 2 – ½ -1/4 =
d) -3 -4/5 + ½ =
e) 7/3 + 2 -1/4 =
f) -3/2 + 1/6 + 2 -2/3 =
g) 1 – ½ + ¼ - 1/8 =
h) 0,2 + ¾ + ½ - ¼ =
i) ½ + (-0,3) + 1/6 =
j) 1/5 + 1/25 + (-0,6) =
7) Calcule o valor de cada expressão:
a) 3/5 – 1 – 2/5 =
b) 3/5 – 0,2 + 1/10 =
c) -3 – 2 – 4/3 =
d) 4 – 1/10 + 2/5=
e) 2/3 – ½ -5 =
f) -5/12 – 1/12 + 2/3 =
8) Calcule o valor de cada expressões:
a) -1/3 + 2/9 – 4/3 =
b) -4 + ½ - 1/6 =
c) 0,3 + ½ - ¾ =
d) 1 + ¼ - 3/2 + 5/8 =
e) 0,1 + 3/2 – ¼ + 2 =
f) ¾ + 0,2 – 5/2 – 0,5 =
9) Calcule o valor de cada expressão
a) 1/2 – (-3/5) + 7/10 =
b) -(-1) – (- 4/3) + 5/6 =
c) 2 – ( - 2/3 – ¼) + 0,1 =
d) ( -1 + ½) – ( -1/6 + 2/3) =
e) 2 – [ 3/5 – ( -1/2 + ¼ ) ] =
f) 3 – [ -1/2 – (0,1 + ¼ )] =
g) (1/3 + ½) – (5/6.- ¾) =
h) (5/2 – 1/3 – ¾ ) – (1/2 + 1) =
i) (1/4 + ½ + 2 ) + (-1/6 + 2/3) =
j) (-0,3 + 0,5 ) – ( -2 - 4/5) =
k) (1/6 + 2/3) – (4/10 – 3/5) + 1/3 =
l) 0,2 + (2/3 – ¼) – ( -7/12 + 4/3) =
m) (1 – ¼) + (2 + ½) – (1 - 1/3) – ( 2 – ¼ ) =
a) (+5/7) – (+2/3) =
b) (+2/3) – (+1/2) =
c) (+2/3) – (+4/5) =
d) (-7/8) – (-3/4) =
e) (-2/5) – (-1/4) =
f) (-1/2) – (+5/8) =
g) (+2/3) – ( (+1/5) =
h) (-2/5) – ( +1/2) =
5) Efetue as subtrações:
a) (+1/2) – (+5) =
b) (+5/7) – (+1) =
c) 0 – ( -3/7) =
d) (-4) – (-1/2) =
e) (+0,3) – (-1/5) =
f) (+0,7) – (-1/3) =
6) Calcule
a) -1 – ¾ =
b) (-3/5) + (1/2) =
c) 2 – ½ -1/4 =
d) -3 -4/5 + ½ =
e) 7/3 + 2 -1/4 =
f) -3/2 + 1/6 + 2 -2/3 =
g) 1 – ½ + ¼ - 1/8 =
h) 0,2 + ¾ + ½ - ¼ =
i) ½ + (-0,3) + 1/6 =
j) 1/5 + 1/25 + (-0,6) =
7) Calcule o valor de cada expressão:
a) 3/5 – 1 – 2/5 =
b) 3/5 – 0,2 + 1/10 =
c) -3 – 2 – 4/3 =
d) 4 – 1/10 + 2/5=
e) 2/3 – ½ -5 =
f) -5/12 – 1/12 + 2/3 =
8) Calcule o valor de cada expressões:
a) -1/3 + 2/9 – 4/3 =
b) -4 + ½ - 1/6 =
c) 0,3 + ½ - ¾ =
d) 1 + ¼ - 3/2 + 5/8 =
e) 0,1 + 3/2 – ¼ + 2 =
f) ¾ + 0,2 – 5/2 – 0,5 =
9) Calcule o valor de cada expressão
a) 1/2 – (-3/5) + 7/10 =
b) -(-1) – (- 4/3) + 5/6 =
c) 2 – ( - 2/3 – ¼) + 0,1 =
d) ( -1 + ½) – ( -1/6 + 2/3) =
e) 2 – [ 3/5 – ( -1/2 + ¼ ) ] =
f) 3 – [ -1/2 – (0,1 + ¼ )] =
g) (1/3 + ½) – (5/6.- ¾) =
h) (5/2 – 1/3 – ¾ ) – (1/2 + 1) =
i) (1/4 + ½ + 2 ) + (-1/6 + 2/3) =
j) (-0,3 + 0,5 ) – ( -2 - 4/5) =
k) (1/6 + 2/3) – (4/10 – 3/5) + 1/3 =
l) 0,2 + (2/3 – ¼) – ( -7/12 + 4/3) =
m) (1 – ¼) + (2 + ½) – (1 - 1/3) – ( 2 – ¼ ) =