Question

1- Efetue as adições e simplifique o resultado quando possível:
a) 5/3 + 7/3=
b) 4/5 - 1/5 + 2/5=
c) 1/6 + 3/6 - 7/6=
d) 3/4 + 1/4 + 7/4=
e) -1/9 - 3/9 - 5/9=
f) 4/3 - 1/3 - 2/3=
g) 8/5 - 10/5 + 1/5=
h) 1/7 + 2/7 - 17/7=
i) -3/5 + 2/5 + 8/5=
j) -2/6 - 1/6 + 3/6=
k )-2/3 - 1/4 - 2/6=
l) 1/4 - 2/3=
m) -2/5 + 1/10 - 7/10=
n) 3/5 - 2/3 - 1/2=
o) 6/5 - 1/10 + 3/10=
p) 1/2 - 3/4 - 4/3=
q )1/7 - 2/5=
r) 4/3 + 1/5 + 2/7=
s) 1/2 + 2/3 + 1/4=
t) 3/4 - 1/2 - 7/6=
u) 2/3 x 1/5=
v) -1/2 x (-1/5)=
w) 1/3 x (-4/7)=
x) 1/3 x (-4/7)=
y) 3/5 x (-1/4)=
z) 2/3 x (-3/5)

Answer 1

a) 5/3 + 7/3 => 12/3 => 4

b) 4/5 - 1/5 + 2/5 => 3/5 + 2/5 => 5/5 => 1

c) 1/6 + 3/6 - 7/6 => 4/6 - 7/6 => 3/6 (÷3) => 1/2

d) 3/4 + 1/4 + 7/4 => 4/4 + 7/4 => 11/4

e) - 1/9 - 3/9 -:5/9 => - 4/9 - 5/9 => -:9/9 => 1

f) 4/3 - 1/3 - 2/3 => 3/3 - 2/3 => 1/3

g) 8/5 - 10/5 + 1/5 => - 2/5 + 1/5 => -1/5

h) 1/7 + 2/7 - 17/7 => 3/7 - 17/7 => - 14/7

i) - 3/5 + 2/5 + 8/5 => - 1/5 + 8/5 => 7/5

j) - 2/6 - 1/6 + 3/6 => - 3/6 + 3/6=> 0

K) - 2/3 - 1/4 - 2/6 => - 8/12 - 3/12 - 2/6 =>
- 11/12 - 2/6 => -11/12 - 4/12 => -15/12

m) - 2/5 + 1/10 - 7/10 => - 4/10 - 7/10 =>
- 11/10

n) 3/5 - 2/3 - 1/2 => 9/15 - 1/2 => 18/30 - 15/30 => 3/30 (÷3) => 1/10

o) 6/5 - 1/10 + 3/10 => 12/10 - 1/10 => 2/10 + 3/10 => 5/10 (÷5) => 1/2

p) 1/2 - 3/4 - 4/3 => 2/4 - 3/4 - 4/3 => - 1/4 - 4/3 => - 3/12 - 16/12 => - 19/12

q) 1/7 - 2/5 => 5/35 - 14/35 => - 9/35

r) 4/3 + 1/5 + 2/7 => 20/15 + 3/15 + 2/7 => 23/15 + 2/7 => 161/105 + 30/105 = 191/105

s) 1/2 + 2/3 + 1/4 => 3/6 + 4/6 + 1/4 => 7/6 + 1/4 -=> 14/12 + 3/12 => 17/12

t) 3/4 - 1/2 - 7/6 => 3/4 - 2/4 - 7/6 => 1/4 - 7/6 => 3/12 - 14/12 => - 11/12

u) 2/3 x 1/5 => 2/15

v) - 1/2 x ( -1/5 ) => 1/10

w) 1/3x( - 4/7 ) => - 4/21

y) 3/5 x ( - 1/4 ) => - 3/20

z) 2/3 x ( - 3/5 ) => - 6/15