Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 406 · 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. 1.450 − 77 =
2. 2.415 − 89 =
3. 3.256 − 27 =
4. 4.480 − 97 =
5. 5.318 − 36 =
6. 6.531 − 99 =
7. 7.188 − 19 =
8. 8.380 − 49 =
9. 9.166 − 86 =
10. 10.344 − 69 =
11. 11.454 − 17 =
12. 12.163 − 57 =
13. 13.422 − 67 =
14. 14.348 − 66 =
15. 15.364 − 66 =
16. 16.427 − 39 =
17. 17.185 − 27 =
18. 18.108 − 36 =
19. 19.569 − 36 =
20. 20.259 − 29 =
21. 21.362 − 17 =
22. 22.200 − 49 =
23. 23.393 − 98 =
24. 24.491 − 28 =
25. 25.543 − 17 =
26. 26.260 − 88 =
27. 27.160 − 88 =
28. 28.538 − 56 =
29. 29.240 − 16 =
30. 30.313 − 87 =
31. 31.267 − 29 =
32. 32.155 − 38 =
33. 33.568 − 46 =
34. 34.278 − 38 =
35. 35.178 − 58 =
36. 36.529 − 97 =
37. 37.106 − 58 =
38. 38.240 − 29 =
39. 39.137 − 56 =
40. 40.359 − 67 =

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