Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 89 · 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. 1.304 − 66 =
2. 2.530 − 47 =
3. 3.183 − 16 =
4. 4.263 − 29 =
5. 5.155 − 76 =
6. 6.541 − 28 =
7. 7.455 − 46 =
8. 8.108 − 59 =
9. 9.200 − 87 =
10. 10.125 − 96 =
11. 11.455 − 59 =
12. 12.598 − 49 =
13. 13.506 − 27 =
14. 14.548 − 19 =
15. 15.101 − 18 =
16. 16.492 − 39 =
17. 17.280 − 26 =
18. 18.402 − 17 =
19. 19.176 − 49 =
20. 20.141 − 47 =
21. 21.491 − 69 =
22. 22.52 − 49 =
23. 23.390 − 99 =
24. 24.552 − 28 =
25. 25.449 − 67 =
26. 26.418 − 47 =
27. 27.247 − 46 =
28. 28.337 − 99 =
29. 29.234 − 16 =
30. 30.447 − 39 =
31. 31.191 − 96 =
32. 32.301 − 56 =
33. 33.175 − 49 =
34. 34.296 − 27 =
35. 35.102 − 56 =
36. 36.314 − 97 =
37. 37.557 − 36 =
38. 38.200 − 96 =
39. 39.536 − 67 =
40. 40.200 − 16 =

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