Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 39 · 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. 1.86 − 29 =
2. 2.418 − 78 =
3. 3.468 − 28 =
4. 4.531 − 28 =
5. 5.84 − 26 =
6. 6.94 − 19 =
7. 7.460 − 26 =
8. 8.95 − 68 =
9. 9.378 − 86 =
10. 10.526 − 37 =
11. 11.314 − 97 =
12. 12.502 − 78 =
13. 13.141 − 16 =
14. 14.199 − 66 =
15. 15.584 − 77 =
16. 16.362 − 46 =
17. 17.52 − 19 =
18. 18.590 − 86 =
19. 19.523 − 97 =
20. 20.84 − 77 =
21. 21.199 − 47 =
22. 22.126 − 29 =
23. 23.433 − 58 =
24. 24.76 − 29 =
25. 25.318 − 88 =
26. 26.585 − 26 =
27. 27.266 − 37 =
28. 28.167 − 77 =
29. 29.275 − 88 =
30. 30.569 − 18 =
31. 31.519 − 28 =
32. 32.526 − 78 =
33. 33.69 − 39 =
34. 34.482 − 48 =
35. 35.266 − 98 =
36. 36.565 − 87 =
37. 37.312 − 19 =
38. 38.572 − 49 =
39. 39.228 − 69 =
40. 40.284 − 68 =

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