Question

$(3 - \ \frac{1}{4}) \div ( - \frac{40}{7} )$
Alguém me ajuda? ​

Answer 1

Resposta:

$(3-\frac{1}{4})\div (-\frac{40}{7})=(\frac{12-1}{4})\div (-\frac{40}{7})=(\frac{11}{4})\div (-\frac{40}{7})=(\frac{11}{4}).(-\frac{7}{40})=\frac{77}{160}$