Bài 1 :

a) )\(\frac{2}{3} - \frac{16}{3} = \frac{- 14}{3}\).

\(b , = \left(\right. \frac{3}{7} + \frac{4}{7} \left.\right) + \left(\right. - \frac{6}{19} + \frac{- 13}{19} \left.\right) = 1 - 1 = 0\)

\(c , = \frac{3}{5} . \left(\right. \frac{8}{9} - \frac{7}{9} + \frac{26}{9} \left.\right) = \frac{3}{5} . 3 = \frac{9}{5}\)

Bài 1 :

a) )\(\frac{2}{3} - \frac{16}{3} = \frac{- 14}{3}\).

\(b , = \left(\right. \frac{3}{7} + \frac{4}{7} \left.\right) + \left(\right. - \frac{6}{19} + \frac{- 13}{19} \left.\right) = 1 - 1 = 0\)

\(c , = \frac{3}{5} . \left(\right. \frac{8}{9} - \frac{7}{9} + \frac{26}{9} \left.\right) = \frac{3}{5} . 3 = \frac{9}{5}\)

Bài 1 :

a) )\(\frac{2}{3} - \frac{16}{3} = \frac{- 14}{3}\).

\(b , = \left(\right. \frac{3}{7} + \frac{4}{7} \left.\right) + \left(\right. - \frac{6}{19} + \frac{- 13}{19} \left.\right) = 1 - 1 = 0\)

\(c , = \frac{3}{5} . \left(\right. \frac{8}{9} - \frac{7}{9} + \frac{26}{9} \left.\right) = \frac{3}{5} . 3 = \frac{9}{5}\)

Bài 1 :

a) )\(\frac{2}{3} - \frac{16}{3} = \frac{- 14}{3}\).

\(b , = \left(\right. \frac{3}{7} + \frac{4}{7} \left.\right) + \left(\right. - \frac{6}{19} + \frac{- 13}{19} \left.\right) = 1 - 1 = 0\)

\(c , = \frac{3}{5} . \left(\right. \frac{8}{9} - \frac{7}{9} + \frac{26}{9} \left.\right) = \frac{3}{5} . 3 = \frac{9}{5}\)

Bài 1 :

a) )\(\frac{2}{3} - \frac{16}{3} = \frac{- 14}{3}\).

\(b , = \left(\right. \frac{3}{7} + \frac{4}{7} \left.\right) + \left(\right. - \frac{6}{19} + \frac{- 13}{19} \left.\right) = 1 - 1 = 0\)

\(c , = \frac{3}{5} . \left(\right. \frac{8}{9} - \frac{7}{9} + \frac{26}{9} \left.\right) = \frac{3}{5} . 3 = \frac{9}{5}\)

Bài 1 :

a) )\(\frac{2}{3} - \frac{16}{3} = \frac{- 14}{3}\).

\(b , = \left(\right. \frac{3}{7} + \frac{4}{7} \left.\right) + \left(\right. - \frac{6}{19} + \frac{- 13}{19} \left.\right) = 1 - 1 = 0\)

\(c , = \frac{3}{5} . \left(\right. \frac{8}{9} - \frac{7}{9} + \frac{26}{9} \left.\right) = \frac{3}{5} . 3 = \frac{9}{5}\)

Bài 1 :

a) )\(\frac{2}{3} - \frac{16}{3} = \frac{- 14}{3}\).

\(b , = \left(\right. \frac{3}{7} + \frac{4}{7} \left.\right) + \left(\right. - \frac{6}{19} + \frac{- 13}{19} \left.\right) = 1 - 1 = 0\)

\(c , = \frac{3}{5} . \left(\right. \frac{8}{9} - \frac{7}{9} + \frac{26}{9} \left.\right) = \frac{3}{5} . 3 = \frac{9}{5}\)

Bài 1 :

a) )\(\frac{2}{3} - \frac{16}{3} = \frac{- 14}{3}\).

\(b , = \left(\right. \frac{3}{7} + \frac{4}{7} \left.\right) + \left(\right. - \frac{6}{19} + \frac{- 13}{19} \left.\right) = 1 - 1 = 0\)

\(c , = \frac{3}{5} . \left(\right. \frac{8}{9} - \frac{7}{9} + \frac{26}{9} \left.\right) = \frac{3}{5} . 3 = \frac{9}{5}\)

Bài 1 :

a) )\(\frac{2}{3} - \frac{16}{3} = \frac{- 14}{3}\).

\(b , = \left(\right. \frac{3}{7} + \frac{4}{7} \left.\right) + \left(\right. - \frac{6}{19} + \frac{- 13}{19} \left.\right) = 1 - 1 = 0\)

\(c , = \frac{3}{5} . \left(\right. \frac{8}{9} - \frac{7}{9} + \frac{26}{9} \left.\right) = \frac{3}{5} . 3 = \frac{9}{5}\)

Bài 1 :

a) )\(\frac{2}{3} - \frac{16}{3} = \frac{- 14}{3}\).

\(b , = \left(\right. \frac{3}{7} + \frac{4}{7} \left.\right) + \left(\right. - \frac{6}{19} + \frac{- 13}{19} \left.\right) = 1 - 1 = 0\)

\(c , = \frac{3}{5} . \left(\right. \frac{8}{9} - \frac{7}{9} + \frac{26}{9} \left.\right) = \frac{3}{5} . 3 = \frac{9}{5}\)