1. 直接写出得数。(16☆)
3.5×0.6=
5×0.05=
12.5×800=
22×0.8=
0.8×1.25=
2.22×0.2=
30×0.2=
3.2×0.5=
3.3×0.03=
20×0.5=
0.6×1.25=
2.03×0.5=
9×0.09=
5.14×5=
125×0.2=
5.2×0.6=
0.25×0.8=
2.5×0.05=
0.6×12.5=
0.8×1.6=
2.11×0.5=
3.25×0.8=
3.6×0.5=
9.1×0.2=
0.17×0.3=
12.5×0.8=
0.4×500=
0.8×0.5=
0.44×0.3=
1.03×0.6=
2.8×0.6=
0.81×0.3=

1. 2.1
0.25
10000
17.6
1
0.444
6
1.6
0.099
10
0.75
1.015
0.81
25.7
25
3.12
0.2
0.125
7.5
1.28
1.055
2.6
1.8
1.82
0.051
10
200
0.4
0.132
0.618
1.68
0.243

2. 列竖式计算,带*的用乘法交换律验算。(10☆)
18.5×1.7=
2.17×1.2=
3. 06×2.6=

2. 31.45
2.604
7.956

3. 计算下面各题,能简算的要简算。(24☆)
12.5×6.7×0.8
9.24+9.24×99
0.28×202
0.875×101-0.875
3.2×0.25×12.5
0.49×197.9+19.79×5.1
用时：分钟
共得：☆/50 ☆

3. 67
924
56.56
87.5
10
197.9