Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 813 · 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. 1.181 − 86 =
2. 2.540 − 37 =
3. 3.592 − 96 =
4. 4.315 − 97 =
5. 5.315 − 68 =
6. 6.110 − 27 =
7. 7.164 − 77 =
8. 8.435 − 69 =
9. 9.537 − 46 =
10. 10.549 − 59 =
11. 11.549 − 66 =
12. 12.492 − 57 =
13. 13.553 − 38 =
14. 14.499 − 37 =
15. 15.338 − 97 =
16. 16.117 − 98 =
17. 17.153 − 36 =
18. 18.408 − 47 =
19. 19.167 − 37 =
20. 20.243 − 49 =
21. 21.405 − 19 =
22. 22.198 − 69 =
23. 23.399 − 87 =
24. 24.380 − 47 =
25. 25.300 − 36 =
26. 26.469 − 56 =
27. 27.296 − 96 =
28. 28.91 − 89 =
29. 29.155 − 27 =
30. 30.124 − 37 =
31. 31.108 − 29 =
32. 32.211 − 86 =
33. 33.305 − 19 =
34. 34.512 − 67 =
35. 35.441 − 97 =
36. 36.194 − 46 =
37. 37.519 − 57 =
38. 38.357 − 99 =
39. 39.183 − 27 =
40. 40.170 − 78 =

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