Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 440 · 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. 1.407 − 67 =
2. 2.188 − 97 =
3. 3.137 − 27 =
4. 4.112 − 26 =
5. 5.209 − 46 =
6. 6.506 − 27 =
7. 7.390 − 56 =
8. 8.454 − 18 =
9. 9.414 − 76 =
10. 10.518 − 28 =
11. 11.388 − 89 =
12. 12.213 − 67 =
13. 13.340 − 77 =
14. 14.517 − 76 =
15. 15.490 − 87 =
16. 16.155 − 77 =
17. 17.429 − 29 =
18. 18.522 − 36 =
19. 19.151 − 58 =
20. 20.157 − 67 =
21. 21.226 − 86 =
22. 22.357 − 96 =
23. 23.176 − 17 =
24. 24.390 − 98 =
25. 25.373 − 39 =
26. 26.554 − 99 =
27. 27.392 − 36 =
28. 28.485 − 66 =
29. 29.73 − 28 =
30. 30.156 − 47 =
31. 31.305 − 69 =
32. 32.175 − 67 =
33. 33.70 − 16 =
34. 34.307 − 16 =
35. 35.153 − 49 =
36. 36.594 − 36 =
37. 37.594 − 88 =
38. 38.517 − 86 =
39. 39.306 − 99 =
40. 40.529 − 98 =

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