Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 814 · 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. 1.432 − 88 =
2. 2.82 − 38 =
3. 3.277 − 97 =
4. 4.343 − 99 =
5. 5.566 − 46 =
6. 6.387 − 37 =
7. 7.479 − 77 =
8. 8.393 − 67 =
9. 9.172 − 86 =
10. 10.483 − 27 =
11. 11.168 − 29 =
12. 12.239 − 47 =
13. 13.178 − 98 =
14. 14.114 − 27 =
15. 15.330 − 36 =
16. 16.179 − 26 =
17. 17.91 − 39 =
18. 18.198 − 97 =
19. 19.221 − 36 =
20. 20.479 − 76 =
21. 21.453 − 78 =
22. 22.575 − 38 =
23. 23.332 − 49 =
24. 24.414 − 69 =
25. 25.70 − 38 =
26. 26.425 − 56 =
27. 27.293 − 29 =
28. 28.273 − 66 =
29. 29.498 − 19 =
30. 30.68 − 49 =
31. 31.532 − 27 =
32. 32.145 − 18 =
33. 33.132 − 26 =
34. 34.443 − 87 =
35. 35.520 − 36 =
36. 36.584 − 36 =
37. 37.564 − 28 =
38. 38.299 − 29 =
39. 39.314 − 26 =
40. 40.106 − 88 =

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