Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 373 · 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. 1.166 − 17 =
2. 2.107 − 56 =
3. 3.580 − 17 =
4. 4.310 − 99 =
5. 5.219 − 77 =
6. 6.238 − 77 =
7. 7.240 − 57 =
8. 8.421 − 46 =
9. 9.132 − 88 =
10. 10.499 − 26 =
11. 11.272 − 79 =
12. 12.425 − 78 =
13. 13.537 − 16 =
14. 14.466 − 87 =
15. 15.194 − 19 =
16. 16.175 − 77 =
17. 17.111 − 39 =
18. 18.316 − 78 =
19. 19.194 − 38 =
20. 20.207 − 36 =
21. 21.527 − 86 =
22. 22.463 − 66 =
23. 23.87 − 57 =
24. 24.369 − 66 =
25. 25.171 − 19 =
26. 26.437 − 38 =
27. 27.504 − 17 =
28. 28.415 − 97 =
29. 29.340 − 77 =
30. 30.580 − 16 =
31. 31.433 − 78 =
32. 32.352 − 99 =
33. 33.593 − 19 =
34. 34.457 − 27 =
35. 35.100 − 38 =
36. 36.478 − 67 =
37. 37.561 − 46 =
38. 38.522 − 19 =
39. 39.524 − 16 =
40. 40.68 − 39 =

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