Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 710 · 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. 1.109 − 18 =
2. 2.434 − 38 =
3. 3.484 − 38 =
4. 4.291 − 19 =
5. 5.180 − 18 =
6. 6.150 − 68 =
7. 7.392 − 26 =
8. 8.529 − 26 =
9. 9.490 − 37 =
10. 10.306 − 66 =
11. 11.467 − 26 =
12. 12.333 − 17 =
13. 13.476 − 36 =
14. 14.407 − 56 =
15. 15.453 − 88 =
16. 16.122 − 59 =
17. 17.540 − 39 =
18. 18.447 − 99 =
19. 19.411 − 66 =
20. 20.500 − 99 =
21. 21.292 − 56 =
22. 22.468 − 27 =
23. 23.469 − 37 =
24. 24.53 − 39 =
25. 25.363 − 37 =
26. 26.392 − 36 =
27. 27.137 − 27 =
28. 28.496 − 46 =
29. 29.240 − 87 =
30. 30.224 − 46 =
31. 31.100 − 38 =
32. 32.355 − 78 =
33. 33.579 − 87 =
34. 34.309 − 17 =
35. 35.55 − 16 =
36. 36.171 − 19 =
37. 37.179 − 96 =
38. 38.348 − 47 =
39. 39.257 − 87 =
40. 40.263 − 28 =

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