Question

MMC 3/9 + 6/3 =
MMC 3/4 + 1/4 =
MMC 5/4 - 3/8 =
MMC 2/15 - 3/2 =​

Answer 1

Explicação passo-a-passo:

$\sf \dfrac{3}{9}+\dfrac{6}{3}=\dfrac{1\cdot3+3\cdot6}{9}=\dfrac{3+18}{9}=\dfrac{21}{9}=\dfrac{7}{3}$

$\sf \dfrac{3}{4}+\dfrac{1}{4}=\dfrac{3+1}{4}=\dfrac{4}{4}=1$

$\sf \dfrac{5}{4}-\dfrac{3}{8}=\dfrac{2\cdot5-1\cdot3}{8}=\dfrac{10-3}{8}=\dfrac{7}{8}$

$\sf \dfrac{2}{15}-\dfrac{3}{2}=\dfrac{2\cdot2-15\cdot3}{9}=\dfrac{4-45}{30}=\dfrac{-41}{30}$

Answer 2

Resposta:

Olá, tudo bem?

Assim como na questão anterior, a questão exige um conhecimento de matemática básica: MMC.

3/9 + 6/3 -> 3/9 + 18/9 = 21/9

3/4 + 1/4 = 4/4 ou 1

5/4 - 3/8 -> 10/8 - 3/8 = 7/8

2/15 - 3/2 -> 4/30 - 45/30 = -41/30