\(\frac{5.7.13}{26+5.13}=\frac{5.7.13}{2.13+5.13}=\frac{5.7.13}{13\left(2+5\right)}=\frac{5.7}{2+5}\)

\(\frac{5.7.13}{26+5.13}=\frac{5.7.13}{13.\left(2+5\right)}=\frac{5.7}{2+5}=\frac{5.7}{10}=\frac{5.7}{2.5}=\frac{7}{2}\)

d

\(\frac{5.7.13}{26+5.13}=\frac{5.7.13}{13.2+5.13}=\frac{5.7.13}{13.\left(2+5\right)}=\frac{13.7.5}{13.7}=\frac{5}{1}=5\)

b)\(\frac{5.7.133}{26+5.13}\)

Ta có:\(\frac{5.7.19.7}{13.2+5.13}\)

           \(\frac{5.7.7.19}{13.\left(2+5\right)}\)

             \(\frac{5.7.7.19}{13.7}\)

             \(\frac{5.7.19}{13}=\frac{35.19}{13}\)

\(\frac{3}{7}.\frac{9}{26}-\frac{1}{14}.\frac{1}{13}\)

\(=\frac{27}{182}-\frac{1}{182}\)

\(=\frac{1}{7}\)

\(\frac{3}{5}.\frac{13}{46}-\frac{1}{10}.\frac{16}{23}\)

\(=\frac{6}{10}.\frac{13}{46}-\frac{1}{10}.\frac{16}{23}\)

\(=\frac{1}{10}.\frac{78}{46}-\frac{1}{10}.\frac{16}{32}\)

\(=\frac{1}{10}\left(\frac{78}{46}-\frac{32}{46}\right)\)

\(=\frac{1}{10}.1=\frac{1}{10}\)

Bạn hỏi từng câu thôi nha

\(-11^5.\frac{13^7}{11^5}.13^8=-1.13^7.13^8=-13^{15}\)

Ải dải nhanh nhất có tích

vdfhc

Rút gọn phân số  -11^5.13^7/11^5.13^8 

Ai dải đúng mình sẽ k

\(\frac{-1}{13}\)Kik nha