Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 899 · 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. 1.411 − 47 =
2. 2.322 − 46 =
3. 3.209 − 48 =
4. 4.66 − 39 =
5. 5.305 − 66 =
6. 6.102 − 97 =
7. 7.315 − 19 =
8. 8.189 − 99 =
9. 9.377 − 89 =
10. 10.584 − 26 =
11. 11.189 − 17 =
12. 12.197 − 38 =
13. 13.208 − 27 =
14. 14.475 − 17 =
15. 15.126 − 17 =
16. 16.116 − 76 =
17. 17.458 − 78 =
18. 18.573 − 66 =
19. 19.120 − 66 =
20. 20.342 − 79 =
21. 21.404 − 99 =
22. 22.143 − 38 =
23. 23.359 − 66 =
24. 24.60 − 36 =
25. 25.312 − 28 =
26. 26.523 − 69 =
27. 27.456 − 89 =
28. 28.333 − 49 =
29. 29.396 − 36 =
30. 30.585 − 96 =
31. 31.98 − 19 =
32. 32.241 − 87 =
33. 33.91 − 49 =
34. 34.311 − 28 =
35. 35.482 − 39 =
36. 36.151 − 86 =
37. 37.114 − 48 =
38. 38.80 − 67 =
39. 39.108 − 77 =
40. 40.285 − 99 =

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