Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 539 · 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. 1.497 − 39 =
2. 2.374 − 79 =
3. 3.345 − 79 =
4. 4.316 − 26 =
5. 5.120 − 46 =
6. 6.129 − 36 =
7. 7.339 − 57 =
8. 8.318 − 77 =
9. 9.576 − 66 =
10. 10.105 − 46 =
11. 11.509 − 46 =
12. 12.537 − 86 =
13. 13.363 − 67 =
14. 14.509 − 89 =
15. 15.170 − 86 =
16. 16.566 − 17 =
17. 17.563 − 39 =
18. 18.567 − 66 =
19. 19.495 − 78 =
20. 20.62 − 28 =
21. 21.275 − 28 =
22. 22.234 − 68 =
23. 23.288 − 86 =
24. 24.316 − 17 =
25. 25.244 − 56 =
26. 26.579 − 86 =
27. 27.157 − 97 =
28. 28.534 − 26 =
29. 29.197 − 96 =
30. 30.245 − 87 =
31. 31.119 − 26 =
32. 32.192 − 18 =
33. 33.424 − 67 =
34. 34.536 − 86 =
35. 35.351 − 79 =
36. 36.486 − 27 =
37. 37.387 − 26 =
38. 38.425 − 26 =
39. 39.89 − 86 =
40. 40.300 − 47 =

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