Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 410 · 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. 1.228 − 96 =
2. 2.108 − 87 =
3. 3.511 − 49 =
4. 4.355 − 18 =
5. 5.463 − 37 =
6. 6.483 − 96 =
7. 7.162 − 88 =
8. 8.160 − 18 =
9. 9.129 − 66 =
10. 10.65 − 37 =
11. 11.247 − 38 =
12. 12.429 − 37 =
13. 13.537 − 96 =
14. 14.394 − 49 =
15. 15.430 − 87 =
16. 16.146 − 97 =
17. 17.593 − 86 =
18. 18.152 − 67 =
19. 19.384 − 39 =
20. 20.360 − 67 =
21. 21.158 − 18 =
22. 22.555 − 68 =
23. 23.91 − 26 =
24. 24.317 − 19 =
25. 25.186 − 39 =
26. 26.429 − 86 =
27. 27.475 − 68 =
28. 28.124 − 47 =
29. 29.342 − 96 =
30. 30.397 − 88 =
31. 31.214 − 96 =
32. 32.229 − 36 =
33. 33.72 − 66 =
34. 34.274 − 16 =
35. 35.221 − 68 =
36. 36.587 − 79 =
37. 37.455 − 46 =
38. 38.249 − 49 =
39. 39.364 − 29 =
40. 40.295 − 38 =

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