Question

Simplify 2 upon 3 plus minus 4 upon 5 + 7 upon 15 7 plus minus 11 upon 20 bracket means division

Answer 1

$\frac{2}{3} + \Big(\frac{-4}{5}\Big) + \frac{7}{15} \div \Big( 7+ \big(\frac{-11}{20}\big)\Big)$

$= \frac{2}{3} -\frac{4}{5}+ \frac{7}{15} \div \Big( 7- \frac{11}{20}\Big)$

$= \frac{10-12+7}{15} \div \Big( \frac{140 - 11}{20}\Big)$

$= \frac{5}{15} \div \Big( \frac{129}{20}\Big)$

$= \frac{1}{3} \times \frac{20}{129}$

$= \frac{20}{387}$

Therefore.,

$\red{ \frac{2}{3} + \Big(\frac{-4}{5}\Big) + \frac{7}{15} \div \Big( 7+ \big(\frac{-11}{20}\big)\Big)}$

$\green {= \frac{20}{387}}$

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