Question

2° ) Calcule as adições e subtrações de frações heterogêneas.
a) 5/2 + 3/4
b) 3/2 + 7/3
c) 6/8 + 3/2
d) 12/6 - 3/8
e) 7/3 + 3/4 - 2/4
f) 4/3 - 1/6
g) 3/2 + 7/3
h) 9/3 + 1/4
i) 6/5 - 2/3 - 1/3
j) 6/7 - 2/3 - 1/3
k) 7/4 - 8/9

Answer 1

Resposta:

a) 5/2 + 3/4 = 10/4 + 3/4 = 13/4

b) 3/2 + 7/3 = 9/6 + 14/6 = 23/6

c) 6/8 + 3/2 = 3/4 + 6/4 = 9/4

d) 12/6 - 3/8 = 2 - 3/8 = 16/8 - 3/8 = 13/8  

e) 7/3 + 3/4 - 2/4 = 7/3 + 1/4 = 28/12 + 3/12 = 31/12  

f) 4/3 - 1/6 = 8/6 - 1/6 = 7/6  

g) 3/2 + 7/3 = 9/6 + 14/6 = 23/6  

h) 9/3 + 1/4 = 36/12 + 3/12 = 39/12 = 13/4  

i) 6/5 - 2/3 - 1/3 = 6/5 - 1 = 6/5 - 5/5 = 1/5  

j) 6/7 - 2/3 - 1/3 = 6/7 - 1 = 6/7 - 7/7 = -1/7  

k) 7/4 - 8/9 = 63/36 - 32/36 = 31/36