Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 729 · 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. 1.363 − 77 =
2. 2.140 − 37 =
3. 3.413 − 68 =
4. 4.276 − 38 =
5. 5.388 − 96 =
6. 6.335 − 38 =
7. 7.242 − 28 =
8. 8.135 − 28 =
9. 9.130 − 99 =
10. 10.172 − 99 =
11. 11.429 − 57 =
12. 12.505 − 78 =
13. 13.110 − 78 =
14. 14.400 − 76 =
15. 15.138 − 69 =
16. 16.189 − 96 =
17. 17.83 − 76 =
18. 18.417 − 98 =
19. 19.297 − 99 =
20. 20.363 − 58 =
21. 21.549 − 67 =
22. 22.540 − 36 =
23. 23.77 − 46 =
24. 24.542 − 28 =
25. 25.398 − 87 =
26. 26.298 − 96 =
27. 27.492 − 76 =
28. 28.385 − 78 =
29. 29.242 − 38 =
30. 30.221 − 26 =
31. 31.284 − 59 =
32. 32.335 − 27 =
33. 33.393 − 47 =
34. 34.585 − 57 =
35. 35.283 − 76 =
36. 36.345 − 28 =
37. 37.460 − 77 =
38. 38.551 − 86 =
39. 39.543 − 67 =
40. 40.589 − 58 =

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