Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 666 · 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. 1.570 − 79 =
2. 2.436 − 27 =
3. 3.82 − 38 =
4. 4.505 − 18 =
5. 5.472 − 59 =
6. 6.134 − 76 =
7. 7.333 − 57 =
8. 8.192 − 19 =
9. 9.490 − 88 =
10. 10.205 − 29 =
11. 11.160 − 87 =
12. 12.157 − 39 =
13. 13.552 − 86 =
14. 14.401 − 19 =
15. 15.155 − 96 =
16. 16.198 − 36 =
17. 17.400 − 59 =
18. 18.108 − 48 =
19. 19.566 − 68 =
20. 20.334 − 66 =
21. 21.126 − 19 =
22. 22.90 − 17 =
23. 23.558 − 59 =
24. 24.301 − 27 =
25. 25.226 − 58 =
26. 26.103 − 77 =
27. 27.405 − 36 =
28. 28.386 − 97 =
29. 29.320 − 48 =
30. 30.140 − 77 =
31. 31.313 − 69 =
32. 32.436 − 79 =
33. 33.85 − 58 =
34. 34.594 − 26 =
35. 35.499 − 17 =
36. 36.479 − 99 =
37. 37.519 − 28 =
38. 38.139 − 48 =
39. 39.576 − 58 =
40. 40.177 − 68 =

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