Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 202 · 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. 1.93 − 68 =
2. 2.524 − 88 =
3. 3.330 − 77 =
4. 4.172 − 36 =
5. 5.131 − 88 =
6. 6.181 − 69 =
7. 7.437 − 66 =
8. 8.533 − 58 =
9. 9.508 − 99 =
10. 10.390 − 78 =
11. 11.544 − 38 =
12. 12.498 − 27 =
13. 13.292 − 97 =
14. 14.450 − 37 =
15. 15.139 − 69 =
16. 16.466 − 39 =
17. 17.260 − 26 =
18. 18.57 − 37 =
19. 19.283 − 47 =
20. 20.451 − 78 =
21. 21.473 − 16 =
22. 22.498 − 38 =
23. 23.122 − 49 =
24. 24.584 − 36 =
25. 25.442 − 89 =
26. 26.330 − 39 =
27. 27.479 − 16 =
28. 28.466 − 49 =
29. 29.95 − 26 =
30. 30.52 − 48 =
31. 31.85 − 36 =
32. 32.442 − 78 =
33. 33.509 − 26 =
34. 34.241 − 19 =
35. 35.122 − 48 =
36. 36.559 − 27 =
37. 37.146 − 96 =
38. 38.251 − 96 =
39. 39.580 − 17 =
40. 40.393 − 66 =

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