Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 83 · 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. 1.439 − 47 =
2. 2.107 − 86 =
3. 3.428 − 19 =
4. 4.593 − 16 =
5. 5.223 − 89 =
6. 6.180 − 87 =
7. 7.233 − 89 =
8. 8.372 − 17 =
9. 9.258 − 17 =
10. 10.435 − 67 =
11. 11.568 − 58 =
12. 12.239 − 37 =
13. 13.345 − 38 =
14. 14.397 − 67 =
15. 15.472 − 97 =
16. 16.239 − 86 =
17. 17.263 − 48 =
18. 18.290 − 58 =
19. 19.156 − 77 =
20. 20.422 − 86 =
21. 21.175 − 87 =
22. 22.152 − 56 =
23. 23.255 − 99 =
24. 24.547 − 29 =
25. 25.201 − 16 =
26. 26.506 − 36 =
27. 27.484 − 39 =
28. 28.206 − 78 =
29. 29.112 − 36 =
30. 30.492 − 16 =
31. 31.381 − 66 =
32. 32.97 − 27 =
33. 33.83 − 17 =
34. 34.279 − 89 =
35. 35.516 − 17 =
36. 36.155 − 46 =
37. 37.422 − 27 =
38. 38.349 − 37 =
39. 39.407 − 47 =
40. 40.276 − 48 =

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