Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 493 · 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. 1.511 − 38 =
2. 2.230 − 38 =
3. 3.181 − 58 =
4. 4.338 − 29 =
5. 5.146 − 79 =
6. 6.259 − 27 =
7. 7.279 − 26 =
8. 8.295 − 76 =
9. 9.265 − 88 =
10. 10.465 − 47 =
11. 11.68 − 58 =
12. 12.164 − 26 =
13. 13.361 − 18 =
14. 14.395 − 49 =
15. 15.279 − 86 =
16. 16.314 − 29 =
17. 17.311 − 48 =
18. 18.257 − 87 =
19. 19.311 − 57 =
20. 20.203 − 77 =
21. 21.85 − 67 =
22. 22.64 − 36 =
23. 23.478 − 78 =
24. 24.357 − 97 =
25. 25.192 − 27 =
26. 26.302 − 46 =
27. 27.382 − 78 =
28. 28.243 − 59 =
29. 29.530 − 78 =
30. 30.267 − 18 =
31. 31.199 − 38 =
32. 32.148 − 36 =
33. 33.345 − 58 =
34. 34.268 − 39 =
35. 35.104 − 36 =
36. 36.355 − 46 =
37. 37.320 − 78 =
38. 38.392 − 97 =
39. 39.104 − 37 =
40. 40.410 − 47 =

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