Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 677 · 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. 1.197 − 17 =
2. 2.160 − 18 =
3. 3.264 − 18 =
4. 4.409 − 66 =
5. 5.336 − 87 =
6. 6.570 − 17 =
7. 7.346 − 89 =
8. 8.284 − 28 =
9. 9.186 − 26 =
10. 10.120 − 26 =
11. 11.536 − 79 =
12. 12.143 − 77 =
13. 13.59 − 58 =
14. 14.477 − 99 =
15. 15.494 − 39 =
16. 16.534 − 37 =
17. 17.424 − 47 =
18. 18.480 − 89 =
19. 19.164 − 89 =
20. 20.430 − 18 =
21. 21.282 − 98 =
22. 22.217 − 87 =
23. 23.538 − 79 =
24. 24.500 − 67 =
25. 25.325 − 29 =
26. 26.471 − 68 =
27. 27.484 − 37 =
28. 28.244 − 39 =
29. 29.66 − 46 =
30. 30.389 − 27 =
31. 31.558 − 99 =
32. 32.424 − 27 =
33. 33.468 − 47 =
34. 34.483 − 39 =
35. 35.184 − 79 =
36. 36.502 − 76 =
37. 37.415 − 46 =
38. 38.201 − 16 =
39. 39.131 − 96 =
40. 40.443 − 59 =

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