Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 312 · 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. 1.479 − 79 =
2. 2.464 − 77 =
3. 3.484 − 27 =
4. 4.505 − 27 =
5. 5.583 − 97 =
6. 6.164 − 79 =
7. 7.154 − 68 =
8. 8.58 − 27 =
9. 9.591 − 89 =
10. 10.585 − 68 =
11. 11.489 − 16 =
12. 12.471 − 27 =
13. 13.346 − 49 =
14. 14.256 − 39 =
15. 15.152 − 57 =
16. 16.126 − 16 =
17. 17.202 − 36 =
18. 18.491 − 98 =
19. 19.394 − 56 =
20. 20.168 − 88 =
21. 21.592 − 19 =
22. 22.140 − 88 =
23. 23.269 − 19 =
24. 24.206 − 28 =
25. 25.97 − 37 =
26. 26.128 − 98 =
27. 27.293 − 18 =
28. 28.78 − 29 =
29. 29.491 − 69 =
30. 30.282 − 37 =
31. 31.589 − 78 =
32. 32.196 − 77 =
33. 33.432 − 28 =
34. 34.372 − 29 =
35. 35.391 − 76 =
36. 36.314 − 17 =
37. 37.61 − 47 =
38. 38.554 − 99 =
39. 39.160 − 38 =
40. 40.319 − 77 =

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