Question

54- Calcule o valor das expressões.

a) 5/6 - 1/4 + 2/3

b) 8 + 1/3 - 3/4

Answer 1

Boa  noite!

a) M.M.C de (6, 4, 3) = 12

$\frac{5}{6}-\frac{1}{4}+\frac{2}{3}$

$\frac{10}{12}-\frac{3}{12}+\frac{8}{12}$

$\frac{7}{12}+\frac{8}{12}\Rightarrow\frac{15}{12}=\boxed{\frac{5}{4}}$

b) M.M.C de (3, 4)

$\frac{8}{1}+\frac{1}{3}-\frac{3}{4}$

$\frac{96}{12}+\frac{4}{12}-\frac{9}{12}$

$\frac{100}{12}-\frac{9}{12}=\boxed{\frac{91}{12}}$

Att;Guilherme Lima

Answer 2

10/12-3/12+8/12=7/12+8/12=15/12

b] 96/12+4/12-9/12=100/12-9/12=91/12