Question

Efectuati calculele :
-1 1/8*(15/36-7/9-3/4)-(0,5)^2

Answer 1

$-1\frac{1}{8}*( \frac{15}{36}- \frac{7}{9}- \frac{3}{4})-(0,5)^{2}= \\ \\ - \frac{9}{8} *( \frac{15-7*4-3*9}{36} )-0,25= \\ \\ - \frac{9}{8} *( \frac{15-28-27}{36} )- \frac{25}{100}= \\ \\ - \frac{9}{8} *( \frac{-40}{36} )- \frac{1}{4}= \\ \\ - \frac{9}{8} *( \frac{-10}{9} )- \frac{1}{4}= \\ \\ \frac{10}{8}- \frac{1}{4} = \\ \\ \frac{5}{4}- \frac{1}{4} = \\ \\ \frac{4}{4} =1 \\ \\ -1\frac{1}{8}*( \frac{15}{36}- \frac{7}{9}- \frac{3}{4})-(0,5)^{2}=1$