Question

\(\frac{7}{9}\chi\frac{8}{5}-\frac{7}{9}\chi\frac{3}{5}\)

Tính nhanh

Answer 1

\(\frac{7}{9}\cdot\frac{8}{5}-\frac{7}{9}\cdot\frac{3}{5}\)

\(=\frac{7}{9}\left(\frac{8}{5}-\frac{3}{5}\right)\)

\(=\frac{7}{9}\cdot\frac{5}{5}\)

\(=\frac{7}{9}\cdot1=\frac{7}{9}\)

Answer 2

ra \(\frac{7}{9}\)nha

Answer 3

7/9 * 8/5 - 7/9 * 3/5 

= 7/9 * ( 8/5 - 3/5 ) 

= 7/9 * 1 

= 7/9 

^^ Ủng hộ nha!!!

Answer 4

7/9.8/5-7/9x3/5

=7/9.(8/5-3/5)

=7/9x1

=7/9

Answer 5

\(\frac{7}{9}.\frac{8}{5}=\frac{7.8}{9.5}=\frac{56}{45}\)

\(\frac{7}{9}.\frac{3}{5}=\frac{7.3}{9.5}=\frac{21}{45}\)

\(\frac{56}{45}-\frac{21}{45}=\frac{56-21}{45}=\frac{35}{45}=\frac{7}{9}\)