Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 547 · 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. 1.485 − 89 =
2. 2.158 − 99 =
3. 3.365 − 28 =
4. 4.294 − 96 =
5. 5.142 − 39 =
6. 6.125 − 16 =
7. 7.528 − 16 =
8. 8.282 − 56 =
9. 9.134 − 36 =
10. 10.432 − 16 =
11. 11.569 − 27 =
12. 12.225 − 26 =
13. 13.323 − 89 =
14. 14.485 − 37 =
15. 15.335 − 18 =
16. 16.278 − 36 =
17. 17.336 − 69 =
18. 18.297 − 17 =
19. 19.85 − 68 =
20. 20.170 − 48 =
21. 21.573 − 68 =
22. 22.107 − 76 =
23. 23.196 − 29 =
24. 24.310 − 58 =
25. 25.398 − 16 =
26. 26.559 − 66 =
27. 27.364 − 36 =
28. 28.286 − 69 =
29. 29.157 − 26 =
30. 30.502 − 97 =
31. 31.265 − 48 =
32. 32.290 − 19 =
33. 33.349 − 36 =
34. 34.305 − 19 =
35. 35.360 − 68 =
36. 36.141 − 46 =
37. 37.405 − 36 =
38. 38.392 − 37 =
39. 39.474 − 38 =
40. 40.206 − 88 =

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