Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 513 · 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. 1.122 − 18 =
2. 2.542 − 86 =
3. 3.312 − 26 =
4. 4.459 − 59 =
5. 5.331 − 98 =
6. 6.389 − 36 =
7. 7.421 − 58 =
8. 8.296 − 28 =
9. 9.118 − 39 =
10. 10.95 − 67 =
11. 11.302 − 48 =
12. 12.388 − 26 =
13. 13.277 − 66 =
14. 14.360 − 47 =
15. 15.302 − 39 =
16. 16.344 − 78 =
17. 17.354 − 27 =
18. 18.143 − 77 =
19. 19.326 − 57 =
20. 20.170 − 78 =
21. 21.498 − 38 =
22. 22.245 − 17 =
23. 23.85 − 26 =
24. 24.591 − 68 =
25. 25.435 − 57 =
26. 26.168 − 58 =
27. 27.453 − 47 =
28. 28.173 − 16 =
29. 29.235 − 57 =
30. 30.102 − 79 =
31. 31.150 − 96 =
32. 32.158 − 66 =
33. 33.153 − 97 =
34. 34.315 − 76 =
35. 35.418 − 46 =
36. 36.381 − 37 =
37. 37.361 − 77 =
38. 38.392 − 28 =
39. 39.245 − 19 =
40. 40.591 − 39 =

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