Question

calculo 1/3 + 2/5 - 10/7 ​

Answer 1

Oie, tudo bom?

$= \frac{1}{3} + \frac{2}{5} - \frac{10}{7} \: \: \: \: \: \: mmc(105) \\ = \frac{1 \: . \: 35}{3 \: . \: 35} + \frac{2 \: . \: 21}{5 \: . \:2 1} - \frac{10 \: . \: 15}{7 \: . \: 15} \\ = \frac{35}{105} + \frac{45}{105} - \frac{150}{105} \\ = \frac{35 + 45 - 150}{105} \\ = \frac{ - 73}{105} \\ \boxed{ = - \frac{73}{105} }$

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