1.

1). 41/802). 2/13). -1/24). -41/80

Answer»

$(\begin{array}{L} 3 - \left( {\frac{1}{5} + 1 \DIV \frac{1}{2}} \right) - \left[ {\left\{ {\frac{4}{2} - \frac{3}{2}} \right\} + 1} \right] \TIMES \frac{7}{8}\\ = 3 - \left( {\frac{1}{5} + 1 \div \frac{1}{2}} \right) - \left[ {\frac{1}{2} + 1} \right] \times \frac{7}{8}\\ = 3 - \left( {\frac{1}{5} + 2} \right) - \frac{3}{2} \times \frac{7}{8}\\ = 3 - \frac{{10 + 1}}{5} - \frac{{21}}{{16}}\\ = \frac{{3 \times 80 - 11 \times 16 - 21 \times 5}}{{80}}\\ = \frac{{240 - 176 - 105}}{{80}} \end{array})$

= -41/80


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