Question

[TRUONG MY DUNG]

\((\frac{15}{22}-\frac{7}{13}).\frac{13}{7}-\frac{15}{22}.(\frac{6}{7}-\frac{22}{15})\)

Answer 1

[hung pham van]

(\(\frac{15}{22}\)-\(\frac{7}{13}\)) x \(\frac{13}{7}\)- \(\frac{15}{22}\) x(\(\frac{6}{7}\)- \(\frac{22}{15}\))

=(\(\frac{15}{22}\)x \(\frac{13}{7}\)- 1) - \(\frac{15}{22}\)x\(\frac{6}{7}\)-1

=\(\frac{15}{22}\)x \(\frac{13}{7}\)-\(\frac{15}{22}\)x\(\frac{6}{7}\)(vì -1+1=0)

=\(\frac{15}{22}\)x(\(\frac{13}{7}\)-\(\frac{6}{7}\))

=\(\frac{15}{22}\)

làm hơi tắt nha

Answer 2

[Ngo Tung Lam]

\(\left(\frac{15}{22}-\frac{7}{13}\right).\frac{13}{7}-\frac{15}{22}.\left(\frac{6}{7}-\frac{22}{15}\right)\)

\(=\frac{15}{22}.\frac{13}{7}-\frac{7}{13}.\frac{13}{7}-\frac{15}{22}.\frac{6}{7}+\frac{15}{22}.\frac{22}{15}\)

\(=\frac{15}{22}.\left(\frac{13}{7}-\frac{6}{7}\right)-1+1\)

\(=\frac{15}{22}.1-1+1\)

\(=\frac{15}{22}-\left(1-1\right)\)

\(=\frac{15}{22}-0\)

\(=\frac{15}{22}\)