Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 719 · 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. 1.491 − 86 =
2. 2.105 − 17 =
3. 3.352 − 17 =
4. 4.288 − 99 =
5. 5.565 − 87 =
6. 6.319 − 19 =
7. 7.280 − 97 =
8. 8.568 − 78 =
9. 9.83 − 58 =
10. 10.596 − 38 =
11. 11.222 − 27 =
12. 12.505 − 96 =
13. 13.317 − 88 =
14. 14.569 − 58 =
15. 15.575 − 18 =
16. 16.270 − 86 =
17. 17.187 − 58 =
18. 18.504 − 97 =
19. 19.548 − 47 =
20. 20.413 − 99 =
21. 21.69 − 17 =
22. 22.330 − 39 =
23. 23.528 − 56 =
24. 24.109 − 16 =
25. 25.144 − 18 =
26. 26.543 − 96 =
27. 27.171 − 96 =
28. 28.261 − 88 =
29. 29.293 − 56 =
30. 30.324 − 88 =
31. 31.565 − 59 =
32. 32.375 − 37 =
33. 33.191 − 89 =
34. 34.334 − 18 =
35. 35.448 − 86 =
36. 36.304 − 26 =
37. 37.368 − 47 =
38. 38.284 − 16 =
39. 39.383 − 17 =
40. 40.181 − 99 =

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