Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 671 · 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. 1.569 − 66 =
2. 2.487 − 36 =
3. 3.160 − 58 =
4. 4.181 − 86 =
5. 5.351 − 98 =
6. 6.419 − 89 =
7. 7.272 − 47 =
8. 8.213 − 17 =
9. 9.492 − 77 =
10. 10.242 − 67 =
11. 11.130 − 99 =
12. 12.188 − 39 =
13. 13.332 − 58 =
14. 14.593 − 29 =
15. 15.174 − 27 =
16. 16.592 − 36 =
17. 17.152 − 78 =
18. 18.320 − 56 =
19. 19.116 − 89 =
20. 20.426 − 39 =
21. 21.128 − 99 =
22. 22.157 − 16 =
23. 23.593 − 47 =
24. 24.117 − 89 =
25. 25.159 − 96 =
26. 26.384 − 89 =
27. 27.129 − 36 =
28. 28.152 − 28 =
29. 29.401 − 86 =
30. 30.485 − 66 =
31. 31.594 − 19 =
32. 32.202 − 68 =
33. 33.228 − 27 =
34. 34.291 − 86 =
35. 35.332 − 38 =
36. 36.329 − 67 =
37. 37.411 − 87 =
38. 38.278 − 16 =
39. 39.93 − 66 =
40. 40.263 − 16 =

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