Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 522 · 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. 1.158 − 18 =
2. 2.188 − 98 =
3. 3.337 − 69 =
4. 4.495 − 17 =
5. 5.425 − 67 =
6. 6.371 − 26 =
7. 7.473 − 58 =
8. 8.171 − 26 =
9. 9.312 − 86 =
10. 10.507 − 38 =
11. 11.516 − 56 =
12. 12.396 − 79 =
13. 13.415 − 59 =
14. 14.454 − 88 =
15. 15.403 − 59 =
16. 16.572 − 16 =
17. 17.132 − 58 =
18. 18.449 − 99 =
19. 19.595 − 26 =
20. 20.455 − 98 =
21. 21.326 − 38 =
22. 22.478 − 37 =
23. 23.259 − 48 =
24. 24.498 − 27 =
25. 25.71 − 17 =
26. 26.98 − 68 =
27. 27.66 − 37 =
28. 28.490 − 46 =
29. 29.431 − 96 =
30. 30.563 − 18 =
31. 31.300 − 49 =
32. 32.504 − 27 =
33. 33.148 − 46 =
34. 34.349 − 86 =
35. 35.386 − 89 =
36. 36.212 − 77 =
37. 37.489 − 66 =
38. 38.434 − 67 =
39. 39.144 − 16 =
40. 40.85 − 36 =

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