Question

1) Calcule as seguintes somas algébricas a) 2/5+3/5 b) 3/9-2/9 c) 4/8-2/8 d) 1/3+1/3 2) Usando o m.m.c, calcule as frações a) 2/5+3/10 b) 4/8-2/4

Answer 1

Resposta:

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

b) 3/9 - 2/9 = 1/9

c) 4/8 - 2/8 = 2/8

d) 1/3 + 1/3 = 2/3

2)

a) 2/5 + 3/10

4/10 + 3/10 = 7/10 = 0,7

b) 4/8 - 2/4

4/8 - 4/8 = 0