Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 13 · 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. 1.433 − 88 =
2. 2.216 − 66 =
3. 3.136 − 36 =
4. 4.526 − 68 =
5. 5.54 − 38 =
6. 6.437 − 59 =
7. 7.211 − 36 =
8. 8.139 − 99 =
9. 9.290 − 26 =
10. 10.414 − 39 =
11. 11.103 − 79 =
12. 12.306 − 78 =
13. 13.550 − 48 =
14. 14.98 − 19 =
15. 15.403 − 56 =
16. 16.267 − 89 =
17. 17.82 − 16 =
18. 18.420 − 96 =
19. 19.349 − 36 =
20. 20.223 − 99 =
21. 21.165 − 88 =
22. 22.99 − 39 =
23. 23.538 − 99 =
24. 24.59 − 47 =
25. 25.268 − 36 =
26. 26.351 − 67 =
27. 27.501 − 77 =
28. 28.592 − 96 =
29. 29.452 − 36 =
30. 30.205 − 18 =
31. 31.495 − 98 =
32. 32.170 − 88 =
33. 33.131 − 79 =
34. 34.460 − 47 =
35. 35.243 − 36 =
36. 36.592 − 88 =
37. 37.392 − 36 =
38. 38.108 − 69 =
39. 39.399 − 76 =
40. 40.517 − 57 =

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