Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 684 · 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. 1.517 − 47 =
2. 2.104 − 18 =
3. 3.283 − 47 =
4. 4.468 − 16 =
5. 5.382 − 98 =
6. 6.586 − 79 =
7. 7.69 − 26 =
8. 8.504 − 37 =
9. 9.114 − 46 =
10. 10.506 − 17 =
11. 11.208 − 57 =
12. 12.375 − 86 =
13. 13.226 − 56 =
14. 14.246 − 57 =
15. 15.294 − 26 =
16. 16.365 − 78 =
17. 17.462 − 68 =
18. 18.489 − 47 =
19. 19.102 − 27 =
20. 20.62 − 46 =
21. 21.404 − 18 =
22. 22.162 − 77 =
23. 23.186 − 97 =
24. 24.213 − 57 =
25. 25.245 − 98 =
26. 26.235 − 87 =
27. 27.241 − 67 =
28. 28.153 − 86 =
29. 29.599 − 79 =
30. 30.590 − 47 =
31. 31.264 − 69 =
32. 32.506 − 66 =
33. 33.89 − 37 =
34. 34.136 − 48 =
35. 35.127 − 28 =
36. 36.162 − 88 =
37. 37.166 − 97 =
38. 38.126 − 39 =
39. 39.337 − 59 =
40. 40.467 − 17 =

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