Question

conta completa por favor

Answer 1

Primeiro faremos 3/2-2/5
Mmc(5,2) = 10
15-4
------ = 11/10
10

Vamos fazer a outra parte

Mmc(4,3) = 12

15-8
------ = 7/12
12

11/10 + 7/12

Mmc(10,12) = 60

66+35
--------- = 101/60
60

Answer 2

           $(\frac{3}{2}- \frac{2}{5})+ \frac{5}{4}- \frac{2}{3}) \\ \\ =( \frac{3.5-2.2}{10})+( \frac{3.5-2.4}{12} ) \\ \\ = \frac{15-4}{10} + \frac{15-8}{12} \\ \\ = \frac{11}{10} + \frac{7}{12} \\ \\ = \frac{11.12+7.10}{120} \\ \\ = \frac{132+70}{120} \\ \\ = \frac{202}{120} \\ \\ = \frac{101}{60}$