Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 392 · 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. 1.88 − 67 =
2. 2.114 − 66 =
3. 3.323 − 86 =
4. 4.487 − 89 =
5. 5.212 − 78 =
6. 6.559 − 36 =
7. 7.496 − 98 =
8. 8.380 − 88 =
9. 9.595 − 99 =
10. 10.446 − 39 =
11. 11.499 − 58 =
12. 12.421 − 47 =
13. 13.108 − 86 =
14. 14.82 − 49 =
15. 15.146 − 79 =
16. 16.439 − 48 =
17. 17.380 − 26 =
18. 18.401 − 36 =
19. 19.369 − 46 =
20. 20.284 − 86 =
21. 21.90 − 78 =
22. 22.570 − 97 =
23. 23.124 − 18 =
24. 24.189 − 47 =
25. 25.581 − 36 =
26. 26.135 − 38 =
27. 27.325 − 47 =
28. 28.106 − 18 =
29. 29.74 − 36 =
30. 30.318 − 59 =
31. 31.178 − 36 =
32. 32.111 − 37 =
33. 33.317 − 17 =
34. 34.141 − 76 =
35. 35.216 − 46 =
36. 36.286 − 57 =
37. 37.560 − 56 =
38. 38.284 − 59 =
39. 39.402 − 86 =
40. 40.529 − 67 =

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