Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 330 · 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. 1.229 − 86 =
2. 2.92 − 48 =
3. 3.322 − 29 =
4. 4.316 − 17 =
5. 5.248 − 39 =
6. 6.104 − 26 =
7. 7.164 − 67 =
8. 8.132 − 28 =
9. 9.280 − 56 =
10. 10.269 − 47 =
11. 11.498 − 26 =
12. 12.260 − 27 =
13. 13.263 − 76 =
14. 14.392 − 38 =
15. 15.196 − 49 =
16. 16.285 − 88 =
17. 17.246 − 38 =
18. 18.82 − 28 =
19. 19.517 − 97 =
20. 20.442 − 79 =
21. 21.182 − 16 =
22. 22.212 − 66 =
23. 23.330 − 47 =
24. 24.399 − 97 =
25. 25.369 − 47 =
26. 26.575 − 67 =
27. 27.392 − 36 =
28. 28.555 − 38 =
29. 29.432 − 97 =
30. 30.435 − 89 =
31. 31.592 − 16 =
32. 32.67 − 17 =
33. 33.208 − 97 =
34. 34.486 − 99 =
35. 35.241 − 57 =
36. 36.156 − 58 =
37. 37.457 − 66 =
38. 38.375 − 57 =
39. 39.208 − 57 =
40. 40.423 − 47 =

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