直接写得数
×15= 
×2= 
×
= 
×
= 
×
=
1×
= 
×
= 
×34= 
×
= 
×
=
×
= 
×
= ÷10= 
÷
= 0÷
=
÷4= 1÷
= 22÷
= 
÷= 
÷0.4=
口算题
0.25×4= 4÷0.01= 3.5+7.5=（2.5﹣0.25）×4=
0.96÷0.3= 7.3×0.01= 7.2÷0.12= 12.5×0.7×0.8=
直接写得数：
8.6+2.4= 0.35÷0.7= 0.5×0.2= 1.25×8= 0.36×100=
1﹣0.09﹣0.9= 2.8+3.2= 0÷8×0.25= 12.3﹣2.3=
口算．
8.5+1.3= 15.7﹣0.4= 3.8×2= 2.6×0.2= 6.9÷3=
1÷0.4= 42÷84= 4﹣0.17= 0.8×1.25= 7.3÷0.01=
直接写出得数
9﹣6.27= 3.6+1.94= 12.5×0.25×0.8×40= 10.2×6.7= 1.17÷9=
30.6﹣6.49﹣3.51= 2.52÷1.8= 5.5×9.8= 6.28÷0.8÷5= 0.8×18.5=
40.8÷0.34= 14.7×0.54+0.46×14.7= 3.25+0.07= 9.47﹣4.7= 4.8×1.4÷7=
用竖式计算，减法题要验算，除法题得数保留两位小数
①4.05﹣1.96 ②0.65×0.48 ③16÷23．