Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 823 · 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. 1.560 − 78 =
2. 2.168 − 88 =
3. 3.108 − 89 =
4. 4.179 − 58 =
5. 5.527 − 19 =
6. 6.123 − 17 =
7. 7.182 − 16 =
8. 8.133 − 18 =
9. 9.414 − 27 =
10. 10.483 − 98 =
11. 11.221 − 38 =
12. 12.513 − 36 =
13. 13.170 − 47 =
14. 14.525 − 17 =
15. 15.120 − 28 =
16. 16.235 − 38 =
17. 17.433 − 57 =
18. 18.195 − 87 =
19. 19.132 − 76 =
20. 20.432 − 68 =
21. 21.274 − 49 =
22. 22.332 − 66 =
23. 23.208 − 66 =
24. 24.290 − 39 =
25. 25.379 − 77 =
26. 26.239 − 79 =
27. 27.141 − 78 =
28. 28.299 − 58 =
29. 29.252 − 19 =
30. 30.164 − 77 =
31. 31.167 − 89 =
32. 32.571 − 78 =
33. 33.158 − 76 =
34. 34.149 − 78 =
35. 35.591 − 18 =
36. 36.296 − 36 =
37. 37.123 − 17 =
38. 38.491 − 76 =
39. 39.152 − 49 =
40. 40.125 − 28 =

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