Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 516 · 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. 1.525 − 99 =
2. 2.345 − 46 =
3. 3.83 − 79 =
4. 4.318 − 16 =
5. 5.244 − 28 =
6. 6.255 − 58 =
7. 7.189 − 86 =
8. 8.540 − 38 =
9. 9.182 − 87 =
10. 10.230 − 86 =
11. 11.340 − 47 =
12. 12.401 − 59 =
13. 13.338 − 16 =
14. 14.597 − 19 =
15. 15.182 − 66 =
16. 16.414 − 18 =
17. 17.578 − 79 =
18. 18.152 − 56 =
19. 19.557 − 76 =
20. 20.233 − 17 =
21. 21.79 − 49 =
22. 22.558 − 26 =
23. 23.175 − 26 =
24. 24.85 − 18 =
25. 25.513 − 66 =
26. 26.195 − 28 =
27. 27.136 − 68 =
28. 28.464 − 26 =
29. 29.521 − 57 =
30. 30.211 − 16 =
31. 31.164 − 67 =
32. 32.598 − 29 =
33. 33.507 − 96 =
34. 34.239 − 96 =
35. 35.133 − 27 =
36. 36.285 − 28 =
37. 37.447 − 27 =
38. 38.360 − 26 =
39. 39.110 − 18 =
40. 40.406 − 16 =

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