Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 768 · 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. 1.470 − 96 =
2. 2.177 − 37 =
3. 3.184 − 97 =
4. 4.518 − 99 =
5. 5.124 − 56 =
6. 6.326 − 77 =
7. 7.139 − 49 =
8. 8.160 − 77 =
9. 9.190 − 29 =
10. 10.139 − 58 =
11. 11.592 − 87 =
12. 12.211 − 48 =
13. 13.529 − 36 =
14. 14.404 − 29 =
15. 15.468 − 28 =
16. 16.88 − 39 =
17. 17.488 − 59 =
18. 18.184 − 97 =
19. 19.233 − 48 =
20. 20.138 − 88 =
21. 21.172 − 47 =
22. 22.183 − 99 =
23. 23.129 − 16 =
24. 24.508 − 96 =
25. 25.136 − 28 =
26. 26.417 − 49 =
27. 27.487 − 16 =
28. 28.141 − 49 =
29. 29.85 − 68 =
30. 30.526 − 69 =
31. 31.588 − 66 =
32. 32.298 − 79 =
33. 33.99 − 29 =
34. 34.298 − 66 =
35. 35.523 − 76 =
36. 36.301 − 18 =
37. 37.554 − 29 =
38. 38.173 − 18 =
39. 39.286 − 28 =
40. 40.243 − 39 =

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