Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 168 · 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. 1.551 − 18 =
2. 2.535 − 16 =
3. 3.382 − 19 =
4. 4.167 − 87 =
5. 5.553 − 97 =
6. 6.152 − 77 =
7. 7.210 − 89 =
8. 8.73 − 56 =
9. 9.466 − 29 =
10. 10.439 − 38 =
11. 11.319 − 66 =
12. 12.526 − 59 =
13. 13.521 − 87 =
14. 14.92 − 87 =
15. 15.146 − 99 =
16. 16.151 − 68 =
17. 17.107 − 78 =
18. 18.372 − 48 =
19. 19.473 − 27 =
20. 20.55 − 39 =
21. 21.419 − 49 =
22. 22.542 − 29 =
23. 23.229 − 67 =
24. 24.493 − 26 =
25. 25.168 − 69 =
26. 26.191 − 18 =
27. 27.361 − 47 =
28. 28.304 − 29 =
29. 29.236 − 16 =
30. 30.423 − 17 =
31. 31.479 − 19 =
32. 32.599 − 49 =
33. 33.592 − 77 =
34. 34.438 − 48 =
35. 35.388 − 89 =
36. 36.155 − 59 =
37. 37.257 − 38 =
38. 38.186 − 26 =
39. 39.92 − 89 =
40. 40.154 − 79 =

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