Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 91 · 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. 1.448 − 96 =
2. 2.139 − 49 =
3. 3.135 − 18 =
4. 4.497 − 46 =
5. 5.304 − 48 =
6. 6.550 − 86 =
7. 7.290 − 37 =
8. 8.237 − 59 =
9. 9.519 − 18 =
10. 10.565 − 28 =
11. 11.232 − 19 =
12. 12.494 − 46 =
13. 13.439 − 56 =
14. 14.475 − 18 =
15. 15.182 − 46 =
16. 16.403 − 66 =
17. 17.108 − 68 =
18. 18.542 − 26 =
19. 19.134 − 69 =
20. 20.417 − 96 =
21. 21.498 − 69 =
22. 22.76 − 47 =
23. 23.286 − 29 =
24. 24.266 − 99 =
25. 25.423 − 27 =
26. 26.222 − 49 =
27. 27.181 − 27 =
28. 28.343 − 48 =
29. 29.546 − 38 =
30. 30.571 − 86 =
31. 31.309 − 16 =
32. 32.124 − 16 =
33. 33.393 − 89 =
34. 34.141 − 19 =
35. 35.110 − 79 =
36. 36.456 − 66 =
37. 37.307 − 66 =
38. 38.182 − 68 =
39. 39.454 − 57 =
40. 40.451 − 27 =

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