Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 271 · 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. 1.459 − 18 =
2. 2.486 − 78 =
3. 3.568 − 96 =
4. 4.153 − 28 =
5. 5.124 − 37 =
6. 6.149 − 28 =
7. 7.58 − 28 =
8. 8.97 − 19 =
9. 9.366 − 19 =
10. 10.487 − 77 =
11. 11.579 − 19 =
12. 12.380 − 59 =
13. 13.53 − 48 =
14. 14.414 − 26 =
15. 15.165 − 99 =
16. 16.599 − 97 =
17. 17.329 − 68 =
18. 18.417 − 67 =
19. 19.476 − 36 =
20. 20.102 − 46 =
21. 21.512 − 87 =
22. 22.367 − 98 =
23. 23.445 − 29 =
24. 24.273 − 18 =
25. 25.67 − 56 =
26. 26.144 − 56 =
27. 27.362 − 49 =
28. 28.537 − 59 =
29. 29.163 − 69 =
30. 30.375 − 89 =
31. 31.299 − 87 =
32. 32.269 − 77 =
33. 33.111 − 26 =
34. 34.94 − 69 =
35. 35.374 − 48 =
36. 36.320 − 26 =
37. 37.240 − 17 =
38. 38.63 − 19 =
39. 39.257 − 66 =
40. 40.504 − 86 =

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