Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 121 · 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. 1.416 − 88 =
2. 2.327 − 87 =
3. 3.510 − 47 =
4. 4.382 − 18 =
5. 5.229 − 69 =
6. 6.511 − 77 =
7. 7.454 − 79 =
8. 8.296 − 99 =
9. 9.305 − 67 =
10. 10.239 − 29 =
11. 11.276 − 98 =
12. 12.378 − 19 =
13. 13.575 − 58 =
14. 14.82 − 18 =
15. 15.112 − 76 =
16. 16.117 − 76 =
17. 17.82 − 56 =
18. 18.337 − 39 =
19. 19.276 − 26 =
20. 20.178 − 86 =
21. 21.519 − 19 =
22. 22.487 − 29 =
23. 23.94 − 36 =
24. 24.139 − 96 =
25. 25.308 − 47 =
26. 26.347 − 39 =
27. 27.471 − 47 =
28. 28.317 − 66 =
29. 29.257 − 69 =
30. 30.470 − 48 =
31. 31.282 − 58 =
32. 32.252 − 28 =
33. 33.478 − 59 =
34. 34.507 − 66 =
35. 35.267 − 39 =
36. 36.316 − 98 =
37. 37.397 − 19 =
38. 38.364 − 17 =
39. 39.469 − 67 =
40. 40.302 − 67 =

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