Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 301 · 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. 1.355 − 68 =
2. 2.381 − 39 =
3. 3.102 − 67 =
4. 4.133 − 27 =
5. 5.77 − 47 =
6. 6.478 − 99 =
7. 7.285 − 76 =
8. 8.554 − 96 =
9. 9.112 − 87 =
10. 10.409 − 18 =
11. 11.167 − 68 =
12. 12.433 − 87 =
13. 13.297 − 48 =
14. 14.58 − 29 =
15. 15.392 − 66 =
16. 16.479 − 89 =
17. 17.245 − 78 =
18. 18.536 − 89 =
19. 19.212 − 98 =
20. 20.410 − 39 =
21. 21.470 − 36 =
22. 22.119 − 56 =
23. 23.437 − 18 =
24. 24.361 − 56 =
25. 25.99 − 58 =
26. 26.394 − 27 =
27. 27.314 − 49 =
28. 28.558 − 59 =
29. 29.176 − 46 =
30. 30.257 − 49 =
31. 31.570 − 36 =
32. 32.580 − 76 =
33. 33.360 − 97 =
34. 34.514 − 58 =
35. 35.227 − 59 =
36. 36.466 − 87 =
37. 37.404 − 66 =
38. 38.339 − 27 =
39. 39.248 − 39 =
40. 40.476 − 96 =

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