Henry goes to a movie with his son____ ____ ____ ____
下列物质既是空气的成分，又属于氧化物的是（ ）
We're trying to________a few hundred dollars every month for our vacation.
直接写出得数．
1.5÷0.5＝____
5.1÷1.7＝____
6.9÷2.3＝____
5.02÷0.01＝____
0.66÷0.3＝____
42.5÷425＝____
0.4÷0.02＝____
1.21÷0.11＝____
1.25÷0.125＝____
0.6÷0.15＝____
0.02÷0.4＝____
49÷0.07＝____
