Question

Calcule a soma entre o dobro de 3/5 com o triplo de 2/8.
Escolha uma:
a. 3/40
b. 23/40
c. 3/10 d. 80/40
e. 78/40

Answer 1

dobro:

2 × 3/5 = 6/5.

triplo :

3 × 2/8 = 6/8

Soma :

6/8 + 6/5 mmc = 40

= (30 + 48)/40

= 78/40 simplifica

= 39/20