Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 918 · 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. 1.307 − 86 =
2. 2.471 − 86 =
3. 3.121 − 68 =
4. 4.552 − 49 =
5. 5.470 − 66 =
6. 6.512 − 16 =
7. 7.107 − 56 =
8. 8.74 − 67 =
9. 9.521 − 18 =
10. 10.132 − 99 =
11. 11.581 − 88 =
12. 12.393 − 39 =
13. 13.122 − 96 =
14. 14.101 − 37 =
15. 15.168 − 36 =
16. 16.548 − 29 =
17. 17.543 − 47 =
18. 18.142 − 57 =
19. 19.312 − 59 =
20. 20.422 − 97 =
21. 21.53 − 17 =
22. 22.113 − 38 =
23. 23.586 − 88 =
24. 24.362 − 18 =
25. 25.455 − 29 =
26. 26.366 − 17 =
27. 27.457 − 29 =
28. 28.280 − 36 =
29. 29.167 − 49 =
30. 30.364 − 97 =
31. 31.279 − 19 =
32. 32.83 − 26 =
33. 33.336 − 17 =
34. 34.309 − 56 =
35. 35.499 − 79 =
36. 36.581 − 19 =
37. 37.246 − 38 =
38. 38.581 − 47 =
39. 39.523 − 69 =
40. 40.571 − 89 =

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