Question

Fração
+3/8 - 1/4 +2/5​

Answer 1

Olá

$\LARGE\tt{} \dfrac{3}{8} - \dfrac{1}{4} + \dfrac{2}{5} \\ \\ \LARGE\tt{} \dfrac{3 \times 5}{8 \times 5} - \dfrac{1 \times 10}{4 \times 10} + \dfrac{2 \times 8}{5 \times 8} \\ \\ \LARGE\tt{} \dfrac{15}{40} - \dfrac{10}{40} + \dfrac{16}{40} \\ \\\LARGE\tt{} \dfrac{15 - 10 + 16}{40} \\ \\ \LARGE\tt{}15 - 10 + 16 \\ \LARGE\tt{}31 - 10 \\ \LARGE\tt{}21 \\ \\ {\large\boxed{\boxed{  { \LARGE \tt \red{ \dfrac{21}{40}} }}}}$

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