Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 185 · 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. 1.536 − 86 =
2. 2.454 − 99 =
3. 3.94 − 68 =
4. 4.165 − 37 =
5. 5.180 − 88 =
6. 6.248 − 19 =
7. 7.332 − 66 =
8. 8.480 − 27 =
9. 9.284 − 97 =
10. 10.53 − 36 =
11. 11.202 − 76 =
12. 12.220 − 17 =
13. 13.543 − 89 =
14. 14.485 − 89 =
15. 15.322 − 19 =
16. 16.470 − 46 =
17. 17.543 − 69 =
18. 18.79 − 77 =
19. 19.355 − 36 =
20. 20.207 − 86 =
21. 21.459 − 48 =
22. 22.80 − 48 =
23. 23.584 − 66 =
24. 24.437 − 19 =
25. 25.277 − 49 =
26. 26.428 − 98 =
27. 27.404 − 47 =
28. 28.447 − 96 =
29. 29.546 − 38 =
30. 30.500 − 49 =
31. 31.477 − 99 =
32. 32.581 − 18 =
33. 33.264 − 96 =
34. 34.538 − 39 =
35. 35.262 − 26 =
36. 36.490 − 58 =
37. 37.143 − 69 =
38. 38.298 − 57 =
39. 39.296 − 89 =
40. 40.280 − 46 =

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