Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 147 · 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. 1.565 − 39 =
2. 2.538 − 87 =
3. 3.389 − 46 =
4. 4.168 − 68 =
5. 5.226 − 39 =
6. 6.192 − 27 =
7. 7.52 − 37 =
8. 8.496 − 46 =
9. 9.504 − 48 =
10. 10.124 − 28 =
11. 11.520 − 48 =
12. 12.211 − 36 =
13. 13.443 − 76 =
14. 14.480 − 49 =
15. 15.599 − 27 =
16. 16.328 − 17 =
17. 17.521 − 96 =
18. 18.383 − 96 =
19. 19.366 − 57 =
20. 20.230 − 27 =
21. 21.396 − 48 =
22. 22.478 − 46 =
23. 23.409 − 96 =
24. 24.377 − 57 =
25. 25.109 − 58 =
26. 26.284 − 79 =
27. 27.240 − 29 =
28. 28.488 − 59 =
29. 29.513 − 59 =
30. 30.243 − 19 =
31. 31.202 − 59 =
32. 32.465 − 39 =
33. 33.470 − 56 =
34. 34.347 − 76 =
35. 35.566 − 57 =
36. 36.555 − 69 =
37. 37.490 − 88 =
38. 38.579 − 96 =
39. 39.478 − 27 =
40. 40.124 − 48 =

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