Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 631 · 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. 1.115 − 16 =
2. 2.317 − 36 =
3. 3.424 − 78 =
4. 4.586 − 58 =
5. 5.480 − 98 =
6. 6.308 − 16 =
7. 7.339 − 79 =
8. 8.446 − 17 =
9. 9.569 − 96 =
10. 10.410 − 69 =
11. 11.225 − 88 =
12. 12.111 − 89 =
13. 13.153 − 26 =
14. 14.263 − 18 =
15. 15.88 − 48 =
16. 16.478 − 17 =
17. 17.373 − 49 =
18. 18.310 − 78 =
19. 19.401 − 98 =
20. 20.73 − 38 =
21. 21.297 − 56 =
22. 22.187 − 26 =
23. 23.514 − 59 =
24. 24.576 − 68 =
25. 25.204 − 89 =
26. 26.547 − 59 =
27. 27.171 − 88 =
28. 28.491 − 86 =
29. 29.201 − 76 =
30. 30.200 − 88 =
31. 31.439 − 96 =
32. 32.478 − 97 =
33. 33.236 − 57 =
34. 34.263 − 76 =
35. 35.200 − 37 =
36. 36.251 − 96 =
37. 37.552 − 99 =
38. 38.148 − 86 =
39. 39.261 − 69 =
40. 40.267 − 89 =

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