Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 82 · 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. 1.432 − 38 =
2. 2.341 − 56 =
3. 3.399 − 46 =
4. 4.255 − 29 =
5. 5.578 − 79 =
6. 6.64 − 36 =
7. 7.496 − 58 =
8. 8.248 − 68 =
9. 9.235 − 38 =
10. 10.423 − 27 =
11. 11.592 − 36 =
12. 12.371 − 79 =
13. 13.170 − 98 =
14. 14.314 − 76 =
15. 15.118 − 67 =
16. 16.283 − 76 =
17. 17.547 − 96 =
18. 18.73 − 49 =
19. 19.409 − 37 =
20. 20.151 − 88 =
21. 21.97 − 89 =
22. 22.591 − 59 =
23. 23.190 − 97 =
24. 24.202 − 49 =
25. 25.95 − 89 =
26. 26.259 − 27 =
27. 27.443 − 58 =
28. 28.86 − 79 =
29. 29.94 − 87 =
30. 30.440 − 86 =
31. 31.142 − 16 =
32. 32.258 − 18 =
33. 33.331 − 17 =
34. 34.428 − 77 =
35. 35.238 − 98 =
36. 36.61 − 29 =
37. 37.556 − 78 =
38. 38.163 − 86 =
39. 39.464 − 87 =
40. 40.278 − 97 =

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