2.4÷0.04= 125×32= 0.25×0.4= 
=
1.29﹣0.18= 13﹣7.2﹣2.8= 0.88+0.12= 0.42=
= 
= 
= ：
=
．
2.4÷0.04= 125×32= 0.25×0.4= =
1.29﹣0.18= 13﹣7.2﹣2.8= 0.88+0.12= 0.42== = = ：=．
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