Question

пж срооочно 5 Класс дам 20 б​

Answer 1

$5\dfrac{8}{35} + 2\dfrac{9}{28} = (5 + 2) + (\dfrac{8}{35}^{\times 4} + \dfrac{9}{28}^{\times5}) = 7 + \dfrac{32 + 45}{140} = 7\dfrac{77}{140} = 7\dfrac{11}{20}$