直接写出得数．
1.57+3.03= 13.7﹣5.6= 7.5÷0.1= 0.25×8=
×12= 
÷
= 
×
= 
﹣
=
3.14×20= 2×
= 6.4÷0.4= 2﹣1.05=
4×3.14= 300×0.01%= 
×
= 0.42÷8=
直接写出得数．
1.57+3.03= 13.7﹣5.6= 7.5÷0.1= 0.25×8=×12= ÷= ×= ﹣=
3.14×20= 2×= 6.4÷0.4= 2﹣1.05=
4×3.14= 300×0.01%= ×= 0.42÷8=
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