Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 487 · 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. 1.219 − 87 =
2. 2.161 − 99 =
3. 3.173 − 98 =
4. 4.205 − 36 =
5. 5.536 − 17 =
6. 6.538 − 96 =
7. 7.164 − 76 =
8. 8.58 − 49 =
9. 9.570 − 17 =
10. 10.171 − 89 =
11. 11.416 − 17 =
12. 12.58 − 27 =
13. 13.441 − 99 =
14. 14.289 − 28 =
15. 15.397 − 56 =
16. 16.577 − 38 =
17. 17.398 − 56 =
18. 18.427 − 37 =
19. 19.220 − 37 =
20. 20.478 − 57 =
21. 21.121 − 19 =
22. 22.523 − 86 =
23. 23.582 − 17 =
24. 24.246 − 47 =
25. 25.347 − 39 =
26. 26.572 − 89 =
27. 27.470 − 77 =
28. 28.448 − 98 =
29. 29.139 − 88 =
30. 30.221 − 37 =
31. 31.503 − 76 =
32. 32.276 − 46 =
33. 33.481 − 27 =
34. 34.408 − 29 =
35. 35.88 − 16 =
36. 36.253 − 57 =
37. 37.208 − 16 =
38. 38.316 − 86 =
39. 39.388 − 99 =
40. 40.223 − 56 =

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