Question

[Nohara Himawari]

Tính bằng hai cách:

2/5x3/7x2/5x4/7

Answer 1

[STY]

\(\frac{3}{5}\times\frac{3}{7}\times\frac{2}{5}\times\frac{4}{7}\)

\(=\frac{9}{35}\times\frac{8}{35}=\frac{72}{1225}\)

C2 : \(\frac{3}{5}\times\frac{3}{7}\times\frac{2}{5}\times\frac{4}{7}=\frac{72}{1225}\)

k cho mik nha

Answer 2

[nguyen thi lan huong]

Cách 1

\(\frac{2}{5}\times\frac{3}{7}\times\frac{2}{5}\times\frac{4}{7}\)

\(=\frac{6}{35}\times\frac{2}{5}\times\frac{4}{7}\)

\(=\frac{12}{175}\times\frac{4}{7}\)

\(=\frac{48}{1225}\)

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