Question

Решите удобным способом
(5*14+6*28)/7

Answer 1

$cfrac{5*14+6*28}{7}= cfrac{5*2*7+6*4*7}{7}=cfrac{7(5*2+6*4)}{7}= \\ =5*2+6*4 = 10 + 24 =34$

Answer 2

Можно и так)

Answer 3

[14(5+6*2)]/7= 2 *17 = 34