Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 501 · 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. 1.386 − 87 =
2. 2.315 − 67 =
3. 3.197 − 17 =
4. 4.442 − 88 =
5. 5.556 − 26 =
6. 6.293 − 17 =
7. 7.408 − 79 =
8. 8.134 − 18 =
9. 9.481 − 97 =
10. 10.499 − 99 =
11. 11.316 − 87 =
12. 12.190 − 36 =
13. 13.186 − 96 =
14. 14.327 − 48 =
15. 15.84 − 76 =
16. 16.204 − 49 =
17. 17.536 − 28 =
18. 18.122 − 38 =
19. 19.450 − 86 =
20. 20.75 − 37 =
21. 21.533 − 16 =
22. 22.286 − 77 =
23. 23.543 − 57 =
24. 24.386 − 18 =
25. 25.438 − 38 =
26. 26.274 − 39 =
27. 27.159 − 87 =
28. 28.274 − 39 =
29. 29.117 − 76 =
30. 30.187 − 98 =
31. 31.265 − 37 =
32. 32.515 − 37 =
33. 33.210 − 57 =
34. 34.115 − 66 =
35. 35.340 − 89 =
36. 36.90 − 77 =
37. 37.581 − 59 =
38. 38.84 − 46 =
39. 39.337 − 88 =
40. 40.117 − 69 =

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