直接写出得数．
572﹣298= 0.75+99×0.75= 9.5+0.59= 250×0.04=
= 
= 76×99= 0.125×9×8=
= 0.56÷0.8×5= 
= 15.73﹣（2.8+1.73）=
直接写出得数．
572﹣298= 0.75+99×0.75= 9.5+0.59= 250×0.04== = 76×99= 0.125×9×8== 0.56÷0.8×5= = 15.73﹣（2.8+1.73）=
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