Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 385 · 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. 1.180 − 17 =
2. 2.139 − 78 =
3. 3.536 − 38 =
4. 4.354 − 48 =
5. 5.437 − 37 =
6. 6.300 − 66 =
7. 7.179 − 37 =
8. 8.443 − 27 =
9. 9.352 − 97 =
10. 10.483 − 97 =
11. 11.189 − 77 =
12. 12.401 − 18 =
13. 13.335 − 88 =
14. 14.241 − 27 =
15. 15.168 − 78 =
16. 16.445 − 17 =
17. 17.282 − 78 =
18. 18.384 − 48 =
19. 19.209 − 77 =
20. 20.407 − 18 =
21. 21.250 − 77 =
22. 22.241 − 26 =
23. 23.465 − 19 =
24. 24.499 − 89 =
25. 25.150 − 67 =
26. 26.55 − 39 =
27. 27.498 − 19 =
28. 28.218 − 18 =
29. 29.399 − 66 =
30. 30.359 − 38 =
31. 31.508 − 68 =
32. 32.246 − 27 =
33. 33.286 − 46 =
34. 34.384 − 78 =
35. 35.448 − 46 =
36. 36.271 − 36 =
37. 37.156 − 67 =
38. 38.189 − 56 =
39. 39.316 − 78 =
40. 40.256 − 39 =

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