Ta có :
\(5-\frac{7}{5}:\frac{3}{10}+\frac{2}{5}\)
\(=5-\frac{7}{5}x\frac{10}{3}+\frac{2}{5}\)
\(=5-\frac{14}{3}+\frac{2}{5}\)
\(=\frac{15}{3}-\frac{14}{3}+\frac{6}{15}\)
\(=\frac{1}{3}+\frac{6}{15}\)
\(=\frac{5}{15}+\frac{6}{15}\)
\(=\frac{11}{15}\)
Tham khảo nha !!!!
5 - \(\frac{7}{5}\): \(\frac{3}{10}\)+ \(\frac{2}{5}\)= 5 - \(\frac{14}{3}\)+ \(\frac{2}{5}\)
= \(\frac{1}{3}\)+ \(\frac{2}{5}\)
= \(\frac{11}{15}\)
gtri của bt=11/15
Mk chắc chắn đúng
\(5-\frac{7}{5}:\frac{3}{10}+\frac{2}{5}=5-\frac{7}{5}\cdot\frac{10}{3}+\frac{2}{5}=5-\frac{14}{3}+\frac{2}{5}=\frac{1}{3}+\frac{2}{5}=\frac{11}{15}\)11 / 15
đang viết thì hết dòng thông cảm
