Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 160 · 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. 1.498 − 47 =
2. 2.220 − 48 =
3. 3.114 − 17 =
4. 4.311 − 16 =
5. 5.388 − 89 =
6. 6.145 − 97 =
7. 7.87 − 46 =
8. 8.169 − 97 =
9. 9.412 − 77 =
10. 10.334 − 59 =
11. 11.416 − 36 =
12. 12.357 − 17 =
13. 13.89 − 56 =
14. 14.352 − 66 =
15. 15.351 − 76 =
16. 16.285 − 26 =
17. 17.166 − 96 =
18. 18.538 − 97 =
19. 19.272 − 38 =
20. 20.224 − 36 =
21. 21.481 − 19 =
22. 22.334 − 96 =
23. 23.251 − 16 =
24. 24.142 − 48 =
25. 25.482 − 59 =
26. 26.108 − 29 =
27. 27.130 − 19 =
28. 28.177 − 89 =
29. 29.560 − 57 =
30. 30.172 − 29 =
31. 31.295 − 46 =
32. 32.201 − 37 =
33. 33.98 − 86 =
34. 34.185 − 47 =
35. 35.479 − 99 =
36. 36.166 − 98 =
37. 37.520 − 39 =
38. 38.540 − 37 =
39. 39.540 − 56 =
40. 40.430 − 27 =

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