Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 605 · 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. 1.238 − 67 =
2. 2.116 − 69 =
3. 3.468 − 18 =
4. 4.521 − 88 =
5. 5.93 − 17 =
6. 6.255 − 29 =
7. 7.530 − 36 =
8. 8.493 − 66 =
9. 9.354 − 37 =
10. 10.480 − 49 =
11. 11.251 − 46 =
12. 12.415 − 49 =
13. 13.101 − 66 =
14. 14.331 − 29 =
15. 15.584 − 16 =
16. 16.481 − 56 =
17. 17.206 − 18 =
18. 18.97 − 37 =
19. 19.263 − 59 =
20. 20.417 − 17 =
21. 21.455 − 47 =
22. 22.237 − 16 =
23. 23.123 − 18 =
24. 24.163 − 87 =
25. 25.225 − 47 =
26. 26.237 − 46 =
27. 27.392 − 97 =
28. 28.457 − 67 =
29. 29.453 − 28 =
30. 30.570 − 87 =
31. 31.121 − 37 =
32. 32.521 − 47 =
33. 33.252 − 37 =
34. 34.158 − 27 =
35. 35.566 − 86 =
36. 36.264 − 16 =
37. 37.336 − 57 =
38. 38.490 − 39 =
39. 39.293 − 96 =
40. 40.514 − 37 =

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