3.2+4.57= 407+11.3+5.3= 0.25×（44﹣8）= 0.9+99×0.9=
6.38×8×125%= 10÷0.1﹣0.1÷10= 7.9×4+2.7= 4﹣4×0.6= ．
3.2+4.57= 407+11.3+5.3= 0.25×（44﹣8）= 0.9+99×0.9=
6.38×8×125%= 10÷0.1﹣0.1÷10= 7.9×4+2.7= 4﹣4×0.6= ．
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