Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 680 · 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. 1.540 − 77 =
2. 2.296 − 76 =
3. 3.174 − 89 =
4. 4.174 − 49 =
5. 5.337 − 56 =
6. 6.263 − 78 =
7. 7.229 − 97 =
8. 8.212 − 38 =
9. 9.521 − 66 =
10. 10.358 − 36 =
11. 11.558 − 18 =
12. 12.224 − 66 =
13. 13.182 − 46 =
14. 14.540 − 96 =
15. 15.147 − 59 =
16. 16.596 − 26 =
17. 17.263 − 18 =
18. 18.209 − 89 =
19. 19.481 − 38 =
20. 20.169 − 96 =
21. 21.327 − 37 =
22. 22.523 − 76 =
23. 23.353 − 98 =
24. 24.360 − 89 =
25. 25.543 − 57 =
26. 26.155 − 46 =
27. 27.130 − 46 =
28. 28.247 − 68 =
29. 29.112 − 57 =
30. 30.326 − 77 =
31. 31.252 − 67 =
32. 32.198 − 97 =
33. 33.563 − 37 =
34. 34.592 − 76 =
35. 35.311 − 89 =
36. 36.512 − 56 =
37. 37.245 − 39 =
38. 38.495 − 19 =
39. 39.451 − 87 =
40. 40.145 − 48 =

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