Question

A soma das frações 1/4+ 3/8 + 5/10 .O resultado será: *
5/10
3/7
9/8
5/9
4/3

Answer 1

Resposta:

9/8 ou

$\boxed{S=\left\{\dfrac{9}{8}\right\}}$

Explicação passo-a-passo:

$\dfrac{1}{4}+\dfrac{3}{8}+\dfrac{5}{10}$

Tirar o MMC (4 , 8 ,10)

4, 8, 10 | 2

2, 4,  5 | 2

1,  2,  5 | 2

1,  1,   5 | 5

1,  1,   1

2 . 2 . 2 . 5 = 40

MMC (4, 8, 10) = 40

$\dfrac{1}{4}+\dfrac{3}{8}+\dfrac{5}{10} = \dfrac{10 + 15 + 20}{40} = \dfrac{45}{40} = \dfrac{45\div5}{40\div5} = \dfrac{9}{8}\\\\\\\boxed{S=\left\{\dfrac{9}{8}\right\}}$

${\begin{center}\fbox{\rule{1ex}{2ex}\hspace{20ex}{#ESPERO TER AJUDADO !}\hspace{20ex}\rule{1ex}{2ex}}}{\end{center}}$

Answer 2

Vamos là.

1/4 + 3/8 + 5/10 = 1/4 + 3/8 + 1/2

mmc = 8

2/8 + 3/8 + 4/8 = 9/8 (C)