列竖式计算。
•1.5−0.4=
•1.4+0.9=
•7.9−0.3=
•6.3−2.6=
•7.2−3.5=
•18.5+24=
•3.6+1.6=
•2.2+5.3=
•15.8+12.4=
•3.7−2.9=
•3.5−0.6=
•3.8+6.5=
•24.7+4.1=
•15.9−4.7=
•63.9−58.7=
•7.2+1.9=
•15.4−13.5=
•16.2−3.1=
•12.4+2.7=
•14.2+11.6=
•28.2−16.4=
•26.8+11.4=
•15.3+4.1=
•34.3−21.2=
•14.4+3.2=
•11.7+6.5=
•29.2−8.5=
•14.6−4.8=
•11.4+2.5=
•12.5−3.2=
•23.7+12.4=
•9.6−3.5=
•20.4+8.4=
•21.4−2.9=
•34.9+2.4=
•15.2−6.9=
•35.4−4.6=
•37.7+6.1=
•14.1+4.3=
•15.6−2.5=
•15.2−4.8=
•26.2−14.5=
建议用时 20分钟 实际用时 分 秒

1. 1.5−0.4=1.1
2. 1.4+0.9=2.3
3. 7.9−0.3=7.6
4. 6.3−2.6=3.7
5. 7.2−3.5=3.7
6. 18.5+24=42.5
7. 3.6+1.6=5.2
8. 2.2+5.3=7.5
9. 15.8+12.4=28.2
10. 3.7−2.9=0.8
11. 3.5−0.6=2.9
12. 3.8+6.5=10.3
13. 24.7+4.1=28.8
14. 15.9−4.7=11.2
15. 63.9−58.7=5.2
16. 7.2+1.9=9.1
17. 15.4−13.5=1.9
18. 16.2−3.1=13.1
19. 12.4+2.7=15.1
20. 14.2+11.6=25.8
21. 28.2−16.4=11.8
22. 26.8+11.4=38.2
23. 15.3+4.1=19.4
24. 34.3−21.2=13.1
25. 14.4+3.2=17.6
26. 11.7+6.5=18.2
27. 29.2−8.5=20.7
28. 14.6−4.8=9.8
29. 11.4+2.5=13.9
30. 12.5−3.2=9.3
31. 23.7+12.4=36.1
32. 9.6−3.5=6.1
33. 20.4+8.4=28.8
34. 21.4−2.9=18.5
35. 34.9+2.4=37.3
36. 15.2−6.9=8.3
37. 35.4−4.6=30.8
38. 37.7+6.1=43.8
39. 14.1+4.3=18.4
40. 15.6−2.5=13.1
41. 15.2−4.8=10.4
42. 26.2−14.5=11.7