Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 93 · 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. 1.320 − 68 =
2. 2.447 − 68 =
3. 3.247 − 57 =
4. 4.165 − 77 =
5. 5.89 − 67 =
6. 6.599 − 56 =
7. 7.339 − 67 =
8. 8.238 − 48 =
9. 9.494 − 29 =
10. 10.460 − 47 =
11. 11.182 − 66 =
12. 12.204 − 69 =
13. 13.178 − 57 =
14. 14.418 − 66 =
15. 15.532 − 18 =
16. 16.528 − 57 =
17. 17.188 − 17 =
18. 18.246 − 89 =
19. 19.107 − 56 =
20. 20.180 − 49 =
21. 21.188 − 16 =
22. 22.290 − 46 =
23. 23.451 − 37 =
24. 24.53 − 29 =
25. 25.171 − 97 =
26. 26.592 − 29 =
27. 27.193 − 38 =
28. 28.570 − 67 =
29. 29.141 − 78 =
30. 30.211 − 17 =
31. 31.88 − 36 =
32. 32.96 − 37 =
33. 33.154 − 19 =
34. 34.158 − 79 =
35. 35.335 − 57 =
36. 36.162 − 78 =
37. 37.492 − 78 =
38. 38.158 − 59 =
39. 39.405 − 49 =
40. 40.599 − 99 =

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