Question

1/2.3/5-1/3.2/5
7-11/4-13/4

Answer 1

Oi,

Resolução

1/2.3/5-1/3.2/5
3/10 - 2/15

MMC = 30

9/30 - 4/30 = 5/30 ÷ 5 = 1/6

7-11/4-13/4

MMC = 4

28/4 - 11/4 - 13/4 = 4/4 ÷ 4 = 1

Espero ter ajudado e bons estudos !

Answer 2

$\dfrac{1}{2} * \dfrac{3}{5} - \dfrac{1}{3} * \dfrac{2}{5} \\ \\ \\ \dfrac{3}{10} - \dfrac{2}{15}$

MMC de 10, 15 = 30

$\dfrac{9 - 4}{30} \\ \\ \\ \dfrac{5}{30} = \dfrac{1}{6}$


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$7 - \dfrac{11}{4} - \dfrac{13}{4} \\ \\ \\ 7 - \dfrac{11 - 13}{4} \\ \\ \\ 7 - \dfrac{24}{4} \\ \\ \\ 7 - 6 \\ \\ \\ => 1$