Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 439 · 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. 1.329 − 28 =
2. 2.423 − 96 =
3. 3.144 − 39 =
4. 4.427 − 99 =
5. 5.437 − 89 =
6. 6.339 − 69 =
7. 7.245 − 89 =
8. 8.165 − 47 =
9. 9.242 − 46 =
10. 10.175 − 56 =
11. 11.277 − 19 =
12. 12.484 − 38 =
13. 13.307 − 57 =
14. 14.328 − 76 =
15. 15.418 − 26 =
16. 16.380 − 47 =
17. 17.360 − 68 =
18. 18.454 − 88 =
19. 19.330 − 37 =
20. 20.449 − 66 =
21. 21.291 − 76 =
22. 22.52 − 47 =
23. 23.279 − 16 =
24. 24.254 − 66 =
25. 25.397 − 46 =
26. 26.302 − 76 =
27. 27.339 − 86 =
28. 28.356 − 67 =
29. 29.458 − 97 =
30. 30.234 − 36 =
31. 31.555 − 26 =
32. 32.114 − 49 =
33. 33.179 − 27 =
34. 34.341 − 59 =
35. 35.425 − 78 =
36. 36.130 − 77 =
37. 37.351 − 46 =
38. 38.589 − 26 =
39. 39.231 − 29 =
40. 40.182 − 87 =

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