Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 595 · 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. 1.282 − 79 =
2. 2.584 − 58 =
3. 3.249 − 18 =
4. 4.439 − 27 =
5. 5.83 − 27 =
6. 6.515 − 58 =
7. 7.335 − 77 =
8. 8.428 − 46 =
9. 9.194 − 78 =
10. 10.372 − 29 =
11. 11.124 − 38 =
12. 12.538 − 77 =
13. 13.175 − 16 =
14. 14.583 − 86 =
15. 15.510 − 28 =
16. 16.434 − 57 =
17. 17.374 − 56 =
18. 18.84 − 66 =
19. 19.561 − 39 =
20. 20.125 − 16 =
21. 21.491 − 69 =
22. 22.223 − 79 =
23. 23.408 − 88 =
24. 24.299 − 96 =
25. 25.449 − 97 =
26. 26.322 − 29 =
27. 27.216 − 19 =
28. 28.564 − 68 =
29. 29.67 − 16 =
30. 30.512 − 28 =
31. 31.240 − 27 =
32. 32.307 − 16 =
33. 33.162 − 79 =
34. 34.228 − 39 =
35. 35.390 − 86 =
36. 36.438 − 37 =
37. 37.465 − 77 =
38. 38.197 − 66 =
39. 39.160 − 39 =
40. 40.373 − 58 =

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