Multiple Choice

$0,75 -\Box =\frac{1}{4}$ ($\frac{1}{2}$) (!$0,25$) (!$\frac{1}{4}$) ($50%$)

$\frac{5}{32} + \Box = 2\frac{3}{4}$ ($2\frac{8}{32}$) (!$2\frac{7}{32}$) (!$0,54$) (!$1\frac{3}{15}$)

$\frac{15}{25} - \frac{1}{4} + \Box = 2,125$ (!$1,875$) (!$\frac{5}{4}$) ($\frac{7}{8}$) (!$0,738$)