750×(1+50%)=
4.8÷80%=
$6\times \frac {2} {5}\div 6\times \frac {2} {5}$=
75÷10%=
1-64%=%
$\frac {1} {3}\times \frac {3} {8}$=
$\frac {1} {3}\times \frac {3} {4}$=
800×(1-20%)=
6×25%=(填小数)
125%×80=
125×1.6=
25%×4÷0.25×4=