Question

alguém arma essas contas?
8/3+10/9 7/8+9/6 5/6-3/5 10/9-5/8​

Answer 1

Resposta:

a) 8/3 + 10/9 = 34/9

b) 7/8 + 9/6 = 19/8

c) 5/6 - 3/5 = 7/30

d) 10/9 - 5/8 = 3/8

Explicação passo a passo:

1ª conta:

$\frac{8}{3}+\frac{10}{9} (MMC(3, 9) = 9)\\ \frac{24}{9}+\frac{10}{9}\\ \frac{24+10}{9}\\ \frac{34}{9}$

2ª conta:

$\frac{7}{8}+\frac{9}{6} (MMC(6, 8) = 24)\\ \frac{21}{24}+\frac{36}{24}\\ \frac{21+36}{24}\\ \frac{57}{24}\\\frac{19}{8}$

3ª conta:

$\frac{5}{6}-\frac{3}{5} (MMC(5, 6) = 30)\\ \frac{25}{30}-\frac{18}{30}\\ \frac{25-18}{30}\\ \frac{7}{30}$

4ª conta:

$\frac{10}{9}-\frac{5}{8} (MMC(8, 9) = 72)\\ \frac{80}{72}-\frac{45}{72}\\ \frac{72-45}{72}\\ \frac{27}{72}\\ \frac{3}{8}$