Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 81 · 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. 1.338 − 36 =
2. 2.244 − 36 =
3. 3.79 − 48 =
4. 4.232 − 77 =
5. 5.465 − 37 =
6. 6.329 − 27 =
7. 7.456 − 67 =
8. 8.81 − 69 =
9. 9.196 − 86 =
10. 10.125 − 97 =
11. 11.406 − 29 =
12. 12.431 − 57 =
13. 13.212 − 38 =
14. 14.472 − 57 =
15. 15.205 − 76 =
16. 16.517 − 77 =
17. 17.396 − 97 =
18. 18.136 − 48 =
19. 19.347 − 38 =
20. 20.324 − 46 =
21. 21.341 − 17 =
22. 22.575 − 58 =
23. 23.154 − 18 =
24. 24.522 − 36 =
25. 25.419 − 26 =
26. 26.144 − 76 =
27. 27.495 − 98 =
28. 28.73 − 56 =
29. 29.188 − 28 =
30. 30.204 − 26 =
31. 31.185 − 79 =
32. 32.584 − 18 =
33. 33.99 − 88 =
34. 34.428 − 69 =
35. 35.77 − 37 =
36. 36.378 − 29 =
37. 37.465 − 86 =
38. 38.314 − 28 =
39. 39.140 − 19 =
40. 40.251 − 38 =

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