Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 72 · 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. 1.240 − 46 =
2. 2.94 − 49 =
3. 3.283 − 97 =
4. 4.124 − 46 =
5. 5.565 − 26 =
6. 6.311 − 69 =
7. 7.177 − 86 =
8. 8.574 − 56 =
9. 9.491 − 77 =
10. 10.523 − 59 =
11. 11.226 − 46 =
12. 12.311 − 86 =
13. 13.118 − 88 =
14. 14.448 − 27 =
15. 15.391 − 46 =
16. 16.424 − 98 =
17. 17.298 − 59 =
18. 18.110 − 37 =
19. 19.284 − 39 =
20. 20.372 − 76 =
21. 21.199 − 46 =
22. 22.188 − 28 =
23. 23.300 − 19 =
24. 24.521 − 19 =
25. 25.426 − 19 =
26. 26.546 − 36 =
27. 27.302 − 26 =
28. 28.151 − 79 =
29. 29.437 − 76 =
30. 30.183 − 79 =
31. 31.435 − 76 =
32. 32.278 − 37 =
33. 33.514 − 17 =
34. 34.512 − 88 =
35. 35.159 − 86 =
36. 36.429 − 28 =
37. 37.195 − 99 =
38. 38.470 − 89 =
39. 39.596 − 88 =
40. 40.579 − 16 =

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