Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 534 · 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. 1.178 − 17 =
2. 2.249 − 96 =
3. 3.170 − 89 =
4. 4.483 − 47 =
5. 5.68 − 19 =
6. 6.167 − 99 =
7. 7.272 − 38 =
8. 8.141 − 29 =
9. 9.299 − 28 =
10. 10.225 − 18 =
11. 11.540 − 18 =
12. 12.360 − 86 =
13. 13.384 − 78 =
14. 14.86 − 69 =
15. 15.159 − 18 =
16. 16.341 − 38 =
17. 17.73 − 57 =
18. 18.555 − 29 =
19. 19.239 − 69 =
20. 20.234 − 86 =
21. 21.533 − 57 =
22. 22.515 − 87 =
23. 23.77 − 26 =
24. 24.236 − 77 =
25. 25.100 − 16 =
26. 26.391 − 57 =
27. 27.417 − 37 =
28. 28.428 − 58 =
29. 29.422 − 28 =
30. 30.422 − 49 =
31. 31.263 − 69 =
32. 32.151 − 57 =
33. 33.530 − 37 =
34. 34.177 − 68 =
35. 35.253 − 38 =
36. 36.328 − 67 =
37. 37.585 − 49 =
38. 38.202 − 86 =
39. 39.499 − 48 =
40. 40.530 − 66 =

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