Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 625 · 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. 1.435 − 99 =
2. 2.320 − 18 =
3. 3.485 − 16 =
4. 4.509 − 79 =
5. 5.358 − 49 =
6. 6.205 − 69 =
7. 7.207 − 86 =
8. 8.506 − 58 =
9. 9.431 − 38 =
10. 10.254 − 79 =
11. 11.256 − 76 =
12. 12.113 − 58 =
13. 13.155 − 16 =
14. 14.404 − 48 =
15. 15.320 − 19 =
16. 16.480 − 37 =
17. 17.240 − 26 =
18. 18.160 − 17 =
19. 19.466 − 66 =
20. 20.457 − 57 =
21. 21.172 − 67 =
22. 22.587 − 98 =
23. 23.325 − 79 =
24. 24.117 − 66 =
25. 25.269 − 37 =
26. 26.367 − 69 =
27. 27.413 − 36 =
28. 28.355 − 17 =
29. 29.351 − 88 =
30. 30.203 − 66 =
31. 31.418 − 99 =
32. 32.89 − 76 =
33. 33.229 − 66 =
34. 34.262 − 38 =
35. 35.447 − 19 =
36. 36.69 − 56 =
37. 37.484 − 56 =
38. 38.411 − 16 =
39. 39.168 − 87 =
40. 40.494 − 37 =

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