Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 339 · 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. 1.162 − 39 =
2. 2.273 − 59 =
3. 3.544 − 37 =
4. 4.109 − 97 =
5. 5.324 − 46 =
6. 6.289 − 99 =
7. 7.293 − 26 =
8. 8.506 − 79 =
9. 9.383 − 78 =
10. 10.280 − 99 =
11. 11.183 − 46 =
12. 12.133 − 48 =
13. 13.351 − 57 =
14. 14.139 − 49 =
15. 15.198 − 66 =
16. 16.324 − 19 =
17. 17.598 − 49 =
18. 18.557 − 48 =
19. 19.461 − 77 =
20. 20.182 − 89 =
21. 21.142 − 77 =
22. 22.467 − 27 =
23. 23.143 − 99 =
24. 24.237 − 19 =
25. 25.398 − 99 =
26. 26.96 − 47 =
27. 27.168 − 87 =
28. 28.269 − 58 =
29. 29.461 − 47 =
30. 30.189 − 48 =
31. 31.66 − 38 =
32. 32.586 − 16 =
33. 33.381 − 19 =
34. 34.471 − 57 =
35. 35.137 − 86 =
36. 36.187 − 38 =
37. 37.102 − 97 =
38. 38.528 − 69 =
39. 39.474 − 76 =
40. 40.159 − 49 =

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