Question

Efetue as operações de adições e subtrações de frações com denominadores diferentes

2/3 + 1/4
3/10 + 1/4
2/8 + 1/4
5/6 - 3/4
4/5 - 2/3
1/3 - 1/13

Answer 1

a) 2/3 + 1/4= 2/12 + 1/12= 2+1/12= 3/12

b) 3/10 + 1/4= 3/20 + 1+20= 3+1/20= 4/20

c) 2/8 + 1/4= 2/8 + 1/8= 2+1/8= 3/8

d) 5/6 - 3/4= 10/12 - 9/12= 1/12

e) 4/5 - 2/3= 12/15 - 10/15= 2/15

f) 1/13 - 1/ 13= 13/39 - 3/39= 10/39