Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 590 · 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. 1.231 − 86 =
2. 2.293 − 68 =
3. 3.351 − 76 =
4. 4.285 − 48 =
5. 5.438 − 66 =
6. 6.596 − 77 =
7. 7.252 − 99 =
8. 8.499 − 27 =
9. 9.333 − 18 =
10. 10.175 − 28 =
11. 11.201 − 57 =
12. 12.462 − 38 =
13. 13.79 − 19 =
14. 14.584 − 39 =
15. 15.547 − 88 =
16. 16.80 − 26 =
17. 17.458 − 76 =
18. 18.68 − 48 =
19. 19.243 − 29 =
20. 20.152 − 16 =
21. 21.362 − 69 =
22. 22.227 − 28 =
23. 23.538 − 17 =
24. 24.115 − 46 =
25. 25.405 − 17 =
26. 26.176 − 56 =
27. 27.478 − 29 =
28. 28.574 − 27 =
29. 29.294 − 29 =
30. 30.462 − 77 =
31. 31.530 − 68 =
32. 32.403 − 29 =
33. 33.309 − 97 =
34. 34.318 − 87 =
35. 35.221 − 17 =
36. 36.222 − 67 =
37. 37.236 − 66 =
38. 38.57 − 36 =
39. 39.225 − 36 =
40. 40.204 − 39 =

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