Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 798 · 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. 1.412 − 66 =
2. 2.457 − 87 =
3. 3.365 − 59 =
4. 4.339 − 58 =
5. 5.123 − 17 =
6. 6.448 − 29 =
7. 7.155 − 76 =
8. 8.569 − 96 =
9. 9.66 − 47 =
10. 10.86 − 57 =
11. 11.103 − 97 =
12. 12.334 − 79 =
13. 13.129 − 38 =
14. 14.142 − 98 =
15. 15.188 − 96 =
16. 16.326 − 67 =
17. 17.240 − 66 =
18. 18.195 − 27 =
19. 19.131 − 16 =
20. 20.531 − 59 =
21. 21.583 − 38 =
22. 22.291 − 96 =
23. 23.519 − 49 =
24. 24.447 − 79 =
25. 25.280 − 88 =
26. 26.118 − 68 =
27. 27.498 − 69 =
28. 28.471 − 49 =
29. 29.182 − 87 =
30. 30.190 − 17 =
31. 31.557 − 39 =
32. 32.373 − 86 =
33. 33.512 − 58 =
34. 34.284 − 28 =
35. 35.159 − 49 =
36. 36.91 − 49 =
37. 37.290 − 36 =
38. 38.104 − 27 =
39. 39.240 − 46 =
40. 40.369 − 56 =

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