Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 125 · 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. 1.433 − 66 =
2. 2.154 − 68 =
3. 3.510 − 29 =
4. 4.405 − 47 =
5. 5.145 − 77 =
6. 6.563 − 48 =
7. 7.340 − 27 =
8. 8.313 − 16 =
9. 9.388 − 49 =
10. 10.211 − 86 =
11. 11.551 − 46 =
12. 12.187 − 59 =
13. 13.503 − 39 =
14. 14.207 − 77 =
15. 15.525 − 67 =
16. 16.144 − 18 =
17. 17.528 − 79 =
18. 18.57 − 47 =
19. 19.554 − 78 =
20. 20.117 − 38 =
21. 21.307 − 48 =
22. 22.481 − 17 =
23. 23.160 − 19 =
24. 24.558 − 97 =
25. 25.321 − 76 =
26. 26.120 − 18 =
27. 27.560 − 39 =
28. 28.122 − 47 =
29. 29.332 − 27 =
30. 30.63 − 29 =
31. 31.293 − 97 =
32. 32.121 − 77 =
33. 33.525 − 69 =
34. 34.179 − 57 =
35. 35.539 − 38 =
36. 36.484 − 39 =
37. 37.325 − 66 =
38. 38.527 − 47 =
39. 39.306 − 86 =
40. 40.154 − 67 =

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