一、口算。
0.07×0.8=
1.6×0.3=
9×3.7=
5×2.4=
0.17×0.2=
0.3×0.9=
2.1×0.7=
0.36×20=
28×0.3=
0.25×0.4=
6×0.15=
3.15×3=
0.4×0.5=
0.72×30=
7.6×0.01=
0.11×0.8=
0.31×500=
0.2×0.04=
3×2.3=
0.83×0.5=
0.5×100=
6×0.25=
5.2×2=
2.7×0.3=
0.07×0.8=
1.6×0.3=
9×3.7=
5×2.4=
0.17×0.2=
0.3×0.9=
2.1×0.7=
0.36×20=
28×0.3=
0.25×0.4=
6×0.15=
3.15×3=
0.4×0.5=
0.72×30=
7.6×0.01=
0.11×0.8=
0.31×500=
0.2×0.04=
3×2.3=
0.83×0.5=
0.5×100=
6×0.25=
5.2×2=
2.7×0.3=
答案
1. 0.056
2. 0.48
3. 33.3
4. 12
5. 0.034
6. 0.27
7. 1.47
8. 7.2
9. 8.4
10. 0.1
11. 0.9
12. 9.45
13. 0.2
14. 21.6
15. 0.076
16. 0.088
17. 155
18. 0.008
19. 6.9
20. 0.415
21. 50
22. 1.5
23. 10.4
24. 0.81
2. 0.48
3. 33.3
4. 12
5. 0.034
6. 0.27
7. 1.47
8. 7.2
9. 8.4
10. 0.1
11. 0.9
12. 9.45
13. 0.2
14. 21.6
15. 0.076
16. 0.088
17. 155
18. 0.008
19. 6.9
20. 0.415
21. 50
22. 1.5
23. 10.4
24. 0.81
二、用竖式计算。(得数保留两位小数)
0.97×0.46≈
3.34×7.6≈
7.2×1.86≈

9.06×1.45≈
5.45×0.16≈
0.045×1.7≈
0.97×0.46≈
3.34×7.6≈
7.2×1.86≈
9.06×1.45≈
5.45×0.16≈
0.045×1.7≈
答案
1. 0.45
2. 25.38
3. 13.39
4. 13.14
5. 0.87
6. 0.08
2. 25.38
3. 13.39
4. 13.14
5. 0.87
6. 0.08
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