Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 283 · 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. 1.421 − 97 =
2. 2.597 − 88 =
3. 3.374 − 17 =
4. 4.198 − 48 =
5. 5.72 − 18 =
6. 6.455 − 48 =
7. 7.505 − 18 =
8. 8.110 − 58 =
9. 9.425 − 28 =
10. 10.464 − 58 =
11. 11.248 − 19 =
12. 12.167 − 36 =
13. 13.222 − 18 =
14. 14.144 − 28 =
15. 15.54 − 16 =
16. 16.573 − 47 =
17. 17.519 − 46 =
18. 18.119 − 38 =
19. 19.76 − 46 =
20. 20.167 − 76 =
21. 21.57 − 37 =
22. 22.442 − 77 =
23. 23.481 − 97 =
24. 24.280 − 98 =
25. 25.133 − 59 =
26. 26.378 − 38 =
27. 27.593 − 78 =
28. 28.322 − 36 =
29. 29.575 − 87 =
30. 30.473 − 57 =
31. 31.198 − 47 =
32. 32.391 − 37 =
33. 33.111 − 98 =
34. 34.427 − 39 =
35. 35.268 − 18 =
36. 36.164 − 29 =
37. 37.595 − 49 =
38. 38.487 − 67 =
39. 39.192 − 39 =
40. 40.125 − 38 =

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