直接写出得数。520×20% =3÷0.1% =

25%×4=	3.7+15%=	72÷80%=	$\text{[math]}$ - $\text{[math]}$ ×0=
$\text{[math]}$ ÷ $\text{[math]}$ =	37.5%- $\text{[math]}$ =	32×3.14=	$\text{[math]}$ × $\text{[math]}$ =

口算与估算容易

$\text{[math]}$ ×5=	28×20%=	$\text{[math]}$ ÷ $\text{[math]}$ =	4- $\text{[math]}$ =
$\text{[math]}$ + $\text{[math]}$ =	$\text{[math]}$ × $\text{[math]}$ =	2.4× $\text{[math]}$ =	30%÷10%=

口算与估算容易

1÷ $\text{[math]}$ =	1÷ $\text{[math]}$ ×7=	0.8×50%=	$\text{[math]}$ ÷ $\text{[math]}$ =
2- $\text{[math]}$ =	16÷50%=	1- $\text{[math]}$ + $\text{[math]}$ =	25%×4=