Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 628 · 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. 1.405 − 88 =
2. 2.576 − 66 =
3. 3.438 − 89 =
4. 4.154 − 18 =
5. 5.466 − 47 =
6. 6.244 − 16 =
7. 7.473 − 26 =
8. 8.467 − 86 =
9. 9.167 − 96 =
10. 10.444 − 68 =
11. 11.349 − 89 =
12. 12.209 − 38 =
13. 13.312 − 96 =
14. 14.53 − 16 =
15. 15.204 − 87 =
16. 16.427 − 76 =
17. 17.453 − 87 =
18. 18.361 − 87 =
19. 19.446 − 59 =
20. 20.485 − 67 =
21. 21.584 − 76 =
22. 22.435 − 76 =
23. 23.270 − 97 =
24. 24.158 − 66 =
25. 25.385 − 29 =
26. 26.497 − 79 =
27. 27.246 − 66 =
28. 28.209 − 69 =
29. 29.134 − 27 =
30. 30.52 − 49 =
31. 31.231 − 19 =
32. 32.321 − 47 =
33. 33.405 − 18 =
34. 34.109 − 78 =
35. 35.167 − 68 =
36. 36.353 − 99 =
37. 37.379 − 26 =
38. 38.582 − 66 =
39. 39.247 − 17 =
40. 40.165 − 56 =

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