直接写出得数．
+0.125= 2÷
×= 3.9÷10%= 32÷1000=
×
= 1÷
= 0.7：0.25= 
+
=
1.03+0.07= 402=
下面各题怎样简便就怎样计算.
9.9×25
3.25×4.7﹣7.8
1.25×32×0.25
8.12×4+1.88×4．
一只蜗牛爬行的速度大约是每分钟1.5cm，它一小时能爬多远？
2.47×6.5+7.53×6.5
0.65×101
4.12﹣1.78﹣1.22
3.6+6.4×1.5．
下面各题怎样简便就怎样计算.
9.9×25 0.75×0.5×4×0.2
1.25×32×0.25 8.12×4+1.88×4
0.32×13.4﹣0.32×3.43.84×99+3.84
2.009×390+20.09×41+200.9×2（9.57+9.57+9.57+9.57 ）×25．
怎样简便就怎样计算．
9.8×25 0.78×101 1.50×102 0.25×0.7×0.8
0.56×99+0.56 1.2×2.5+0.8×2.5 0.038×5×2.1．