Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 217 · 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. 1.518 − 88 =
2. 2.472 − 56 =
3. 3.85 − 37 =
4. 4.188 − 86 =
5. 5.432 − 37 =
6. 6.591 − 97 =
7. 7.428 − 66 =
8. 8.399 − 96 =
9. 9.389 − 86 =
10. 10.235 − 98 =
11. 11.54 − 19 =
12. 12.340 − 39 =
13. 13.180 − 86 =
14. 14.479 − 28 =
15. 15.437 − 67 =
16. 16.217 − 26 =
17. 17.355 − 87 =
18. 18.308 − 57 =
19. 19.417 − 99 =
20. 20.315 − 28 =
21. 21.131 − 99 =
22. 22.579 − 79 =
23. 23.469 − 17 =
24. 24.131 − 86 =
25. 25.461 − 37 =
26. 26.565 − 27 =
27. 27.93 − 36 =
28. 28.194 − 98 =
29. 29.172 − 58 =
30. 30.230 − 57 =
31. 31.327 − 28 =
32. 32.164 − 77 =
33. 33.309 − 68 =
34. 34.154 − 79 =
35. 35.477 − 79 =
36. 36.478 − 86 =
37. 37.369 − 78 =
38. 38.545 − 28 =
39. 39.127 − 18 =
40. 40.126 − 78 =

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