Question

B= \(\frac{1}{2}\) - \(\frac{5}{7}\)  . \(\frac{14}{25}\)

Tìm B

Answer 1

ủng hộ mình nha

Answer 2

\(B=\frac{1}{2}-\frac{1}{7}.\frac{14}{25}=\frac{1}{7}-\frac{1.14}{7.25}=\frac{1}{7}-\frac{1.2.7}{7.25}=\frac{1}{7}-\frac{2}{25}=\frac{25}{175}-\frac{14}{175}=\frac{11}{175}\)