Question

determine as expressões algébricas

com os cálculos por favor​

Answer 1

Vamos là.

a)

3/4 - 3/2 + 1/4 = 1 - 3/2 = 2/2 - 3/2 = -1/2

b)

2/3 - 1/4 - 2 - 1/3 - 2/5

mmc = 60

40/60 - 15/60 - 120/60 - 20/60 - 24/60 = -139/60

c)

1/2 + 1/5 + 1/3

mmc = 30

15/30 + 6/30 + 10/30 = 31/30