Question

(  13 3/7 + 4 5/13 )- 8 3/7 

(6 - 2 4/5 ) . 3 1/8 - 1 3/5 : 1/4 

VD : 8 9/0 là hỗn số nha

Answer 1

\(\left(13\frac{3}{7}+4\frac{5}{13}\right)-8\frac{3}{7}\)

\(=\left(\frac{94}{7}+\frac{57}{13}\right)-\frac{59}{7}\)

\(=\frac{1621}{91}-\frac{59}{7}\)

\(=\frac{122}{3}\)

Answer 2

\(\left(6-2\frac{4}{5}\right)\cdot3\frac{1}{8}-1\frac{3}{5}:\frac{1}{4}\)

\(=\left(6-\frac{14}{5}\right)\cdot\frac{25}{8}-\frac{8}{5}\cdot\frac{4}{1}\)

\(=\frac{16\cdot25}{5\cdot8}-\frac{8\cdot4}{5\cdot1}\)

\(=10-\frac{32}{5}\)

\(=\frac{18}{5}\)

Answer 3

1) \(\left(13\frac{3}{7}+4\frac{5}{13}\right)-8\frac{3}{7}\)

\(=\left(\frac{94}{7}+\frac{57}{13}\right)-\frac{59}{7}\)

\(=\left(\frac{94}{7}-\frac{59}{7}\right)+\frac{57}{13}\)

\(=5+\frac{57}{13}\)

\(=\frac{122}{13}\)