Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 789 · 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. 1.403 − 27 =
2. 2.168 − 99 =
3. 3.188 − 66 =
4. 4.63 − 38 =
5. 5.522 − 98 =
6. 6.279 − 26 =
7. 7.305 − 68 =
8. 8.395 − 58 =
9. 9.137 − 99 =
10. 10.263 − 28 =
11. 11.375 − 66 =
12. 12.195 − 68 =
13. 13.191 − 27 =
14. 14.159 − 96 =
15. 15.207 − 26 =
16. 16.327 − 57 =
17. 17.220 − 49 =
18. 18.281 − 26 =
19. 19.429 − 69 =
20. 20.179 − 97 =
21. 21.280 − 46 =
22. 22.294 − 98 =
23. 23.583 − 19 =
24. 24.499 − 59 =
25. 25.534 − 27 =
26. 26.364 − 89 =
27. 27.264 − 77 =
28. 28.421 − 56 =
29. 29.232 − 39 =
30. 30.256 − 48 =
31. 31.161 − 67 =
32. 32.106 − 38 =
33. 33.158 − 19 =
34. 34.339 − 16 =
35. 35.64 − 26 =
36. 36.453 − 87 =
37. 37.71 − 56 =
38. 38.567 − 39 =
39. 39.149 − 16 =
40. 40.99 − 36 =

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