Question

A)2/9-[5/4+(7/5•3/2)]+2/3
B)3/4-{2/5+[(2/5+3/5)-(1/6+1/2)]}

Answer 1

$\frac{2}{9} - [ \frac{5}{4} + ( \frac{7}{5} . \frac{3}{2})] + \frac{2}{3} =$

$\frac{2}{9} - [ \frac{5}{4} + \frac{7.3}{5.2} ] + \frac{2}{3} =$

$\frac{2}{9} - [ \frac{5}{4} + \frac{21}{10} ] + \frac{2}{3} =$

$\frac{2}{9} - \frac{(40:4.5)+(40:10.21)}{40} + \frac{2}{3} =$

$\frac{2}{9} - \frac{50+84}{40} + \frac{2}{3} =$

$\frac{2}{9} - \frac{134}{40} + \frac{2}{3} =$

$\frac{(360:9.2)-(360:40.134)+(360:3.2)}{360} =$

$\frac{80-1206+240}{360} =$

$\frac{-886}{360} = \frac{-443}{180}$



$\frac{3}{4} - \{ \frac{2}{5} + [ ( \frac{2}{5} + \frac{3}{5} )- ( \frac{1}{6} + \frac{1}{2})] \} =$

$\frac{3}{4} - \{ \frac{2}{5} + [( \frac{2+3}{5}) - \frac{(6:6.1)+(6:2.1)}{6} ] \} =$

$\frac{3}{4} - \{ \frac{2}{5} + [ \frac{5}{5} - \frac{1+3}{6} ] \} =$

$\frac{3}{4} - \{ \frac{2}{5} + [ \frac{5}{5} - \frac{4}{6} ] \} =$

$\frac{3}{4} - \{ \frac{2}{5} + \frac{(30:5.5)-(30:6.4)}{30} \} =$

$\frac{3}{4} - \{ \frac{2}{5} + \frac{30-20}{30} \} =$

$\frac{3}{4} - \{ \frac{2}{5} + \frac{10}{30} \} =$

$\frac{3}{4} - \frac{(30:5.2)+(30:30.10)}{30} =$

$\frac{3}{4} - \frac{12+10}{30} =$

$\frac{3}{4} - \frac{22}{30} =$

$\frac{(60:4.3)-(60:30.22)}{60} =$

$\frac{45-44}{60} =$

$\frac{1}{60}$