Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 400 · 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. 1.127 − 29 =
2. 2.354 − 78 =
3. 3.456 − 18 =
4. 4.184 − 16 =
5. 5.436 − 76 =
6. 6.482 − 79 =
7. 7.101 − 66 =
8. 8.554 − 77 =
9. 9.571 − 86 =
10. 10.590 − 16 =
11. 11.581 − 38 =
12. 12.418 − 76 =
13. 13.390 − 87 =
14. 14.141 − 18 =
15. 15.456 − 29 =
16. 16.331 − 69 =
17. 17.275 − 78 =
18. 18.146 − 59 =
19. 19.346 − 68 =
20. 20.74 − 69 =
21. 21.141 − 99 =
22. 22.201 − 86 =
23. 23.126 − 89 =
24. 24.337 − 76 =
25. 25.176 − 28 =
26. 26.164 − 97 =
27. 27.347 − 28 =
28. 28.327 − 56 =
29. 29.348 − 78 =
30. 30.287 − 77 =
31. 31.169 − 18 =
32. 32.105 − 66 =
33. 33.547 − 27 =
34. 34.121 − 16 =
35. 35.383 − 38 =
36. 36.320 − 88 =
37. 37.81 − 18 =
38. 38.171 − 76 =
39. 39.439 − 37 =
40. 40.332 − 49 =

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