Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 765 · 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. 1.250 − 19 =
2. 2.58 − 39 =
3. 3.313 − 88 =
4. 4.406 − 37 =
5. 5.509 − 46 =
6. 6.373 − 87 =
7. 7.531 − 26 =
8. 8.335 − 99 =
9. 9.142 − 26 =
10. 10.470 − 78 =
11. 11.212 − 68 =
12. 12.133 − 27 =
13. 13.521 − 98 =
14. 14.482 − 79 =
15. 15.415 − 97 =
16. 16.528 − 47 =
17. 17.484 − 47 =
18. 18.108 − 88 =
19. 19.593 − 47 =
20. 20.308 − 47 =
21. 21.567 − 77 =
22. 22.440 − 99 =
23. 23.282 − 36 =
24. 24.543 − 57 =
25. 25.535 − 18 =
26. 26.55 − 18 =
27. 27.423 − 98 =
28. 28.129 − 47 =
29. 29.287 − 89 =
30. 30.472 − 16 =
31. 31.206 − 87 =
32. 32.593 − 67 =
33. 33.587 − 37 =
34. 34.206 − 17 =
35. 35.410 − 46 =
36. 36.574 − 97 =
37. 37.185 − 96 =
38. 38.155 − 67 =
39. 39.173 − 19 =
40. 40.490 − 16 =

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