Question

Rút gọn 

7.25-49

7.24+21

Answer 1

\(\frac{7.25-49}{7.24+21}=\frac{7.25-7.7}{7.24+7.3}\)

\(=\frac{7.\left(25-7\right)}{7.\left(24+3\right)}=\frac{18}{27}\)

\(=\frac{2}{3}\)

Answer 2

\(\frac{7.25-49}{7.24+21}=\frac{7.25-7.7}{7.24+7.3}=\frac{7\left(25-7\right)}{7\left(24+3\right)}\)

                       \(=\frac{7.18}{7.27}=\frac{18}{27}=\frac{2}{3}\)

Cách này cách tính nhanh nhất rồi bạn nhé

Answer 3

\(\frac{7.25-49}{7.24+21}\)

\(=\frac{7.25-7.7}{7.24+7.3}\)

\(=\frac{7\left(25-7\right)}{7\left(24+3\right)}\)

\(=\frac{25-7}{24+3}\)

\(=\frac{18}{27}\)

\(=\frac{2}{3}\)

Answer 4

\(\frac{7.25-49}{7.24+21}\)

\(=\frac{7.25-7.7}{7.24+7.3}\)

\(=\frac{7\left(25-7\right)}{7\left(24+3\right)}\)

\(=\frac{25-7}{24+3}\)

\(=\frac{18}{27}\)

\(=\frac{2}{3}\)