Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 105 · 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. 1.240 − 29 =
2. 2.565 − 46 =
3. 3.323 − 39 =
4. 4.219 − 78 =
5. 5.178 − 79 =
6. 6.418 − 39 =
7. 7.66 − 47 =
8. 8.93 − 77 =
9. 9.472 − 77 =
10. 10.264 − 57 =
11. 11.158 − 76 =
12. 12.416 − 28 =
13. 13.361 − 98 =
14. 14.438 − 99 =
15. 15.496 − 38 =
16. 16.72 − 37 =
17. 17.259 − 38 =
18. 18.233 − 37 =
19. 19.498 − 76 =
20. 20.121 − 59 =
21. 21.214 − 26 =
22. 22.107 − 99 =
23. 23.487 − 87 =
24. 24.212 − 68 =
25. 25.282 − 86 =
26. 26.342 − 47 =
27. 27.179 − 57 =
28. 28.276 − 77 =
29. 29.225 − 87 =
30. 30.320 − 56 =
31. 31.526 − 66 =
32. 32.361 − 58 =
33. 33.392 − 36 =
34. 34.406 − 57 =
35. 35.174 − 98 =
36. 36.331 − 89 =
37. 37.450 − 39 =
38. 38.373 − 88 =
39. 39.465 − 46 =
40. 40.509 − 16 =

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