Question

Calcular

1) 2/3 de 15?

2) 4/5 de 30?

3) 2/3 + 1/5 ?

4) 3/4 +1/3 - 2/5 = ?

Answer 1

1. (2/3) * 15 = (15*2)/3 = 30/3 = 10
2. (4/5) * 30 = (4*30)/5 = 120/5 = 24
3. mmc(3,5) = 15
(2*5)/(3*5) + (1*3)/(5*3) = 10/15 + 3/15 = 13/15
4. mmc(3,4,5) = 60
(3*15)/60 + (1*20)/60 - (2*12)/60 = 45/60 + 20/60 + 24/60 = 89/60