Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 818 · 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. 1.191 − 76 =
2. 2.491 − 79 =
3. 3.135 − 19 =
4. 4.82 − 37 =
5. 5.171 − 98 =
6. 6.151 − 67 =
7. 7.206 − 38 =
8. 8.368 − 69 =
9. 9.134 − 87 =
10. 10.108 − 16 =
11. 11.474 − 37 =
12. 12.523 − 18 =
13. 13.377 − 77 =
14. 14.158 − 47 =
15. 15.409 − 16 =
16. 16.236 − 26 =
17. 17.283 − 67 =
18. 18.226 − 16 =
19. 19.217 − 78 =
20. 20.492 − 68 =
21. 21.507 − 59 =
22. 22.498 − 27 =
23. 23.371 − 96 =
24. 24.259 − 76 =
25. 25.271 − 19 =
26. 26.291 − 56 =
27. 27.176 − 78 =
28. 28.429 − 16 =
29. 29.97 − 59 =
30. 30.176 − 89 =
31. 31.556 − 96 =
32. 32.307 − 69 =
33. 33.584 − 29 =
34. 34.282 − 76 =
35. 35.393 − 96 =
36. 36.310 − 99 =
37. 37.564 − 36 =
38. 38.530 − 19 =
39. 39.82 − 49 =
40. 40.597 − 17 =

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