Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 589 · 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. 1.386 − 97 =
2. 2.213 − 27 =
3. 3.194 − 27 =
4. 4.178 − 38 =
5. 5.161 − 76 =
6. 6.334 − 27 =
7. 7.263 − 19 =
8. 8.234 − 66 =
9. 9.199 − 18 =
10. 10.594 − 77 =
11. 11.77 − 66 =
12. 12.396 − 67 =
13. 13.499 − 48 =
14. 14.205 − 98 =
15. 15.275 − 28 =
16. 16.587 − 78 =
17. 17.129 − 86 =
18. 18.225 − 66 =
19. 19.555 − 87 =
20. 20.110 − 99 =
21. 21.360 − 68 =
22. 22.188 − 27 =
23. 23.555 − 78 =
24. 24.211 − 69 =
25. 25.489 − 39 =
26. 26.73 − 16 =
27. 27.474 − 36 =
28. 28.519 − 36 =
29. 29.487 − 36 =
30. 30.54 − 48 =
31. 31.158 − 16 =
32. 32.101 − 87 =
33. 33.257 − 28 =
34. 34.403 − 39 =
35. 35.184 − 48 =
36. 36.500 − 86 =
37. 37.440 − 78 =
38. 38.482 − 88 =
39. 39.258 − 37 =
40. 40.52 − 38 =

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