1.

1). 1/22). 1/33). 2/34). 4/5

Answer»

$(\begin{array}{l}\left( {\frac{1}{3} \TIMES \frac{3}{5} \div \frac{4}{5} \times \frac{2}{3}} \right) + \left( {\frac{2}{7} \div \frac{3}{7}} \right) - \left( {\frac{4}{9} \times \frac{6}{8}} \right) = \;?\\ \RIGHTARROW \left( {\frac{1}{3} \times \frac{3}{5} \times \frac{5}{4} \times \frac{2}{3}} \right) + \left( {\frac{2}{7} \times \frac{7}{3}} \right) - \left( {\frac{4}{9} \times \frac{6}{8}} \right) = \;?\END{array})$

$(\begin{array}{l} \Rightarrow \frac{1}{6} + \frac{2}{3} - \frac{1}{3} = \;?\\ \Rightarrow \frac{5}{6} - \frac{1}{3} = \;?\end{array})$

∴ ? = ½


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