Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 806 · 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. 1.438 − 27 =
2. 2.58 − 56 =
3. 3.361 − 67 =
4. 4.485 − 46 =
5. 5.164 − 96 =
6. 6.195 − 29 =
7. 7.357 − 58 =
8. 8.255 − 16 =
9. 9.492 − 27 =
10. 10.310 − 87 =
11. 11.462 − 67 =
12. 12.128 − 19 =
13. 13.250 − 36 =
14. 14.222 − 66 =
15. 15.488 − 16 =
16. 16.434 − 88 =
17. 17.352 − 68 =
18. 18.194 − 18 =
19. 19.498 − 36 =
20. 20.539 − 28 =
21. 21.369 − 98 =
22. 22.279 − 46 =
23. 23.520 − 87 =
24. 24.440 − 38 =
25. 25.451 − 99 =
26. 26.205 − 58 =
27. 27.216 − 96 =
28. 28.286 − 77 =
29. 29.450 − 39 =
30. 30.186 − 89 =
31. 31.226 − 96 =
32. 32.349 − 66 =
33. 33.494 − 17 =
34. 34.94 − 66 =
35. 35.264 − 59 =
36. 36.272 − 69 =
37. 37.397 − 26 =
38. 38.434 − 56 =
39. 39.285 − 77 =
40. 40.284 − 68 =

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