Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 830 · 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. 1.154 − 87 =
2. 2.317 − 67 =
3. 3.583 − 57 =
4. 4.251 − 18 =
5. 5.387 − 96 =
6. 6.155 − 97 =
7. 7.231 − 19 =
8. 8.294 − 17 =
9. 9.467 − 49 =
10. 10.526 − 97 =
11. 11.408 − 59 =
12. 12.308 − 86 =
13. 13.409 − 97 =
14. 14.177 − 87 =
15. 15.62 − 36 =
16. 16.139 − 79 =
17. 17.447 − 39 =
18. 18.304 − 16 =
19. 19.62 − 49 =
20. 20.555 − 78 =
21. 21.131 − 56 =
22. 22.280 − 78 =
23. 23.233 − 18 =
24. 24.502 − 18 =
25. 25.563 − 66 =
26. 26.105 − 86 =
27. 27.114 − 18 =
28. 28.176 − 56 =
29. 29.506 − 39 =
30. 30.252 − 99 =
31. 31.181 − 96 =
32. 32.270 − 78 =
33. 33.54 − 27 =
34. 34.415 − 37 =
35. 35.542 − 46 =
36. 36.362 − 26 =
37. 37.103 − 47 =
38. 38.373 − 76 =
39. 39.487 − 87 =
40. 40.165 − 77 =

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