Question

2/3x10/10-4/5x6/6-5/6x5/5+7/10x3-1/12x15x15​

Answer 1

${= \sf \bigg (\dfrac{2}{3} \times \dfrac{10}{10}\bigg) - \bigg(\dfrac{4}{5} \times \dfrac{6}{6}\bigg) - \bigg( \dfrac{5}{6} \times \dfrac{5 }{5} \bigg)+\bigg( \dfrac{7}{10} \times 3\bigg) - \bigg( \dfrac{1}{12} \times 15 \times 15\bigg)}\\\\{ = \sf\dfrac{20}{30} -\dfrac{24}{30} -\dfrac{25}{30} + \dfrac{21}{30} - \bigg( \dfrac{1}{12} \times 15 \times 15\bigg)}\\\\{= \sf\dfrac{20 - 24 - 25 - 21}{30} - \bigg( 18\bigg)} \\\\{= \sf\dfrac{ - 8}{30} - 18}\\\\{= \sf\dfrac{ - 8 -562 }{30}} \\\\ {= \sf\dfrac{ - 570 }{30}}\\\\\sf = 19$

$\boxed{{ \sf \bigg (\dfrac{2}{3} \times \dfrac{10}{10}\bigg) - \bigg(\dfrac{4}{5} \times \dfrac{6}{6}\bigg) - \bigg( \dfrac{5}{6} \times \dfrac{5 }{5} \bigg)+\bigg( \dfrac{7}{10} \times 3\bigg) - \bigg( \dfrac{1}{12} \times 15 \times 15\bigg)} = 19}$