Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 772 · 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. 1.172 − 66 =
2. 2.161 − 36 =
3. 3.204 − 98 =
4. 4.487 − 66 =
5. 5.155 − 76 =
6. 6.74 − 17 =
7. 7.228 − 99 =
8. 8.521 − 97 =
9. 9.298 − 99 =
10. 10.504 − 27 =
11. 11.145 − 98 =
12. 12.363 − 57 =
13. 13.154 − 78 =
14. 14.568 − 86 =
15. 15.576 − 99 =
16. 16.211 − 37 =
17. 17.262 − 87 =
18. 18.72 − 36 =
19. 19.299 − 78 =
20. 20.265 − 87 =
21. 21.183 − 66 =
22. 22.427 − 69 =
23. 23.98 − 79 =
24. 24.588 − 68 =
25. 25.194 − 86 =
26. 26.108 − 96 =
27. 27.445 − 18 =
28. 28.463 − 27 =
29. 29.90 − 59 =
30. 30.518 − 36 =
31. 31.259 − 28 =
32. 32.230 − 17 =
33. 33.432 − 28 =
34. 34.483 − 89 =
35. 35.146 − 58 =
36. 36.155 − 98 =
37. 37.206 − 98 =
38. 38.401 − 76 =
39. 39.239 − 48 =
40. 40.439 − 26 =

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