Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 593 · 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. 1.318 − 17 =
2. 2.284 − 68 =
3. 3.518 − 69 =
4. 4.370 − 76 =
5. 5.68 − 36 =
6. 6.237 − 26 =
7. 7.163 − 86 =
8. 8.159 − 88 =
9. 9.93 − 39 =
10. 10.235 − 39 =
11. 11.336 − 96 =
12. 12.77 − 36 =
13. 13.524 − 57 =
14. 14.340 − 18 =
15. 15.244 − 49 =
16. 16.335 − 86 =
17. 17.305 − 47 =
18. 18.204 − 89 =
19. 19.362 − 17 =
20. 20.265 − 59 =
21. 21.517 − 69 =
22. 22.292 − 99 =
23. 23.304 − 49 =
24. 24.542 − 98 =
25. 25.408 − 69 =
26. 26.357 − 79 =
27. 27.567 − 48 =
28. 28.581 − 47 =
29. 29.310 − 36 =
30. 30.447 − 98 =
31. 31.393 − 18 =
32. 32.522 − 26 =
33. 33.223 − 69 =
34. 34.369 − 76 =
35. 35.380 − 76 =
36. 36.456 − 47 =
37. 37.487 − 36 =
38. 38.353 − 89 =
39. 39.279 − 18 =
40. 40.206 − 79 =

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