Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 637 · 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. 1.156 − 99 =
2. 2.135 − 19 =
3. 3.556 − 96 =
4. 4.355 − 88 =
5. 5.100 − 78 =
6. 6.483 − 78 =
7. 7.294 − 36 =
8. 8.164 − 47 =
9. 9.161 − 16 =
10. 10.372 − 88 =
11. 11.70 − 48 =
12. 12.98 − 17 =
13. 13.420 − 76 =
14. 14.230 − 96 =
15. 15.249 − 69 =
16. 16.335 − 49 =
17. 17.274 − 36 =
18. 18.450 − 87 =
19. 19.512 − 48 =
20. 20.341 − 98 =
21. 21.525 − 19 =
22. 22.567 − 39 =
23. 23.300 − 39 =
24. 24.522 − 36 =
25. 25.507 − 38 =
26. 26.455 − 37 =
27. 27.130 − 66 =
28. 28.156 − 67 =
29. 29.460 − 66 =
30. 30.595 − 47 =
31. 31.200 − 56 =
32. 32.539 − 66 =
33. 33.98 − 18 =
34. 34.409 − 69 =
35. 35.498 − 86 =
36. 36.338 − 88 =
37. 37.553 − 37 =
38. 38.487 − 77 =
39. 39.79 − 77 =
40. 40.454 − 56 =

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