Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 650 · 40 questions

The fast method (Shift both): How much makes the second number round? 68 needs 2 to make 70. Add that amount to BOTH numbers. Take away the round number.

1. 1.443 − 68 =
2. 2.408 − 57 =
3. 3.121 − 18 =
4. 4.211 − 46 =
5. 5.456 − 69 =
6. 6.227 − 56 =
7. 7.180 − 28 =
8. 8.362 − 59 =
9. 9.165 − 98 =
10. 10.370 − 16 =
11. 11.401 − 46 =
12. 12.421 − 77 =
13. 13.136 − 69 =
14. 14.239 − 16 =
15. 15.189 − 37 =
16. 16.166 − 86 =
17. 17.435 − 69 =
18. 18.464 − 66 =
19. 19.580 − 26 =
20. 20.513 − 56 =
21. 21.309 − 56 =
22. 22.265 − 86 =
23. 23.265 − 77 =
24. 24.110 − 99 =
25. 25.461 − 38 =
26. 26.180 − 77 =
27. 27.296 − 57 =
28. 28.113 − 26 =
29. 29.86 − 57 =
30. 30.205 − 86 =
31. 31.83 − 69 =
32. 32.317 − 16 =
33. 33.297 − 68 =
34. 34.341 − 78 =
35. 35.285 − 18 =
36. 36.253 − 26 =
37. 37.153 − 66 =
38. 38.482 − 49 =
39. 39.543 − 79 =
40. 40.595 − 79 =

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