Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 124 · 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. 1.353 − 29 =
2. 2.599 − 87 =
3. 3.543 − 36 =
4. 4.148 − 46 =
5. 5.474 − 28 =
6. 6.191 − 56 =
7. 7.326 − 76 =
8. 8.497 − 27 =
9. 9.556 − 66 =
10. 10.259 − 76 =
11. 11.233 − 86 =
12. 12.242 − 17 =
13. 13.79 − 48 =
14. 14.558 − 39 =
15. 15.249 − 17 =
16. 16.172 − 48 =
17. 17.151 − 49 =
18. 18.546 − 66 =
19. 19.105 − 49 =
20. 20.527 − 49 =
21. 21.276 − 29 =
22. 22.555 − 38 =
23. 23.482 − 78 =
24. 24.343 − 47 =
25. 25.117 − 77 =
26. 26.162 − 78 =
27. 27.154 − 46 =
28. 28.102 − 67 =
29. 29.168 − 27 =
30. 30.328 − 66 =
31. 31.203 − 56 =
32. 32.256 − 18 =
33. 33.61 − 46 =
34. 34.118 − 48 =
35. 35.132 − 27 =
36. 36.470 − 77 =
37. 37.580 − 26 =
38. 38.195 − 57 =
39. 39.370 − 66 =
40. 40.264 − 66 =

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