Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 917 · 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. 1.579 − 36 =
2. 2.224 − 57 =
3. 3.196 − 99 =
4. 4.470 − 67 =
5. 5.100 − 27 =
6. 6.382 − 67 =
7. 7.351 − 68 =
8. 8.68 − 28 =
9. 9.302 − 36 =
10. 10.396 − 87 =
11. 11.291 − 59 =
12. 12.563 − 79 =
13. 13.151 − 29 =
14. 14.199 − 97 =
15. 15.334 − 29 =
16. 16.201 − 97 =
17. 17.201 − 39 =
18. 18.500 − 19 =
19. 19.360 − 16 =
20. 20.188 − 86 =
21. 21.253 − 66 =
22. 22.326 − 46 =
23. 23.123 − 58 =
24. 24.337 − 96 =
25. 25.61 − 16 =
26. 26.542 − 86 =
27. 27.526 − 47 =
28. 28.508 − 67 =
29. 29.314 − 56 =
30. 30.162 − 69 =
31. 31.575 − 56 =
32. 32.426 − 66 =
33. 33.207 − 56 =
34. 34.153 − 87 =
35. 35.299 − 69 =
36. 36.124 − 36 =
37. 37.254 − 29 =
38. 38.117 − 66 =
39. 39.139 − 96 =
40. 40.129 − 17 =

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