Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 521 · 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. 1.76 − 56 =
2. 2.313 − 76 =
3. 3.483 − 29 =
4. 4.338 − 56 =
5. 5.459 − 18 =
6. 6.440 − 16 =
7. 7.540 − 38 =
8. 8.283 − 88 =
9. 9.81 − 67 =
10. 10.551 − 58 =
11. 11.124 − 86 =
12. 12.108 − 98 =
13. 13.196 − 17 =
14. 14.140 − 78 =
15. 15.524 − 26 =
16. 16.305 − 38 =
17. 17.479 − 98 =
18. 18.279 − 26 =
19. 19.325 − 78 =
20. 20.225 − 28 =
21. 21.403 − 27 =
22. 22.570 − 49 =
23. 23.568 − 27 =
24. 24.373 − 49 =
25. 25.240 − 89 =
26. 26.494 − 36 =
27. 27.209 − 98 =
28. 28.114 − 27 =
29. 29.100 − 56 =
30. 30.347 − 36 =
31. 31.233 − 39 =
32. 32.102 − 98 =
33. 33.274 − 16 =
34. 34.381 − 87 =
35. 35.580 − 57 =
36. 36.433 − 26 =
37. 37.561 − 66 =
38. 38.547 − 48 =
39. 39.164 − 97 =
40. 40.511 − 39 =

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