Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 999 · 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. 1.589 − 78 =
2. 2.154 − 58 =
3. 3.457 − 17 =
4. 4.181 − 86 =
5. 5.275 − 69 =
6. 6.109 − 17 =
7. 7.216 − 18 =
8. 8.419 − 26 =
9. 9.141 − 26 =
10. 10.534 − 16 =
11. 11.471 − 26 =
12. 12.549 − 18 =
13. 13.178 − 39 =
14. 14.598 − 89 =
15. 15.542 − 56 =
16. 16.537 − 37 =
17. 17.174 − 86 =
18. 18.274 − 59 =
19. 19.324 − 99 =
20. 20.251 − 87 =
21. 21.479 − 69 =
22. 22.229 − 88 =
23. 23.497 − 59 =
24. 24.66 − 28 =
25. 25.204 − 99 =
26. 26.257 − 18 =
27. 27.111 − 97 =
28. 28.442 − 57 =
29. 29.75 − 29 =
30. 30.321 − 88 =
31. 31.424 − 36 =
32. 32.148 − 26 =
33. 33.181 − 89 =
34. 34.293 − 66 =
35. 35.157 − 39 =
36. 36.106 − 26 =
37. 37.458 − 88 =
38. 38.158 − 78 =
39. 39.308 − 36 =
40. 40.76 − 16 =

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