Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 145 · 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. 1.563 − 29 =
2. 2.103 − 47 =
3. 3.558 − 36 =
4. 4.549 − 67 =
5. 5.191 − 26 =
6. 6.442 − 77 =
7. 7.505 − 99 =
8. 8.503 − 86 =
9. 9.263 − 16 =
10. 10.359 − 69 =
11. 11.247 − 96 =
12. 12.526 − 98 =
13. 13.209 − 66 =
14. 14.587 − 18 =
15. 15.493 − 56 =
16. 16.333 − 96 =
17. 17.298 − 59 =
18. 18.246 − 89 =
19. 19.492 − 38 =
20. 20.84 − 16 =
21. 21.274 − 76 =
22. 22.578 − 87 =
23. 23.467 − 28 =
24. 24.383 − 38 =
25. 25.487 − 97 =
26. 26.492 − 36 =
27. 27.205 − 18 =
28. 28.557 − 89 =
29. 29.411 − 76 =
30. 30.75 − 17 =
31. 31.509 − 26 =
32. 32.284 − 28 =
33. 33.546 − 66 =
34. 34.520 − 86 =
35. 35.139 − 28 =
36. 36.436 − 76 =
37. 37.514 − 76 =
38. 38.91 − 58 =
39. 39.385 − 36 =
40. 40.212 − 86 =

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