Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 910 · 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. 1.302 − 38 =
2. 2.95 − 38 =
3. 3.503 − 29 =
4. 4.569 − 17 =
5. 5.398 − 98 =
6. 6.235 − 66 =
7. 7.185 − 77 =
8. 8.525 − 86 =
9. 9.459 − 79 =
10. 10.550 − 96 =
11. 11.56 − 37 =
12. 12.95 − 88 =
13. 13.476 − 17 =
14. 14.552 − 76 =
15. 15.423 − 28 =
16. 16.246 − 49 =
17. 17.215 − 48 =
18. 18.257 − 48 =
19. 19.552 − 39 =
20. 20.295 − 58 =
21. 21.465 − 98 =
22. 22.152 − 16 =
23. 23.412 − 18 =
24. 24.401 − 27 =
25. 25.469 − 89 =
26. 26.280 − 58 =
27. 27.335 − 37 =
28. 28.116 − 86 =
29. 29.549 − 77 =
30. 30.262 − 28 =
31. 31.186 − 56 =
32. 32.181 − 38 =
33. 33.441 − 96 =
34. 34.552 − 98 =
35. 35.234 − 27 =
36. 36.243 − 27 =
37. 37.468 − 18 =
38. 38.181 − 36 =
39. 39.87 − 16 =
40. 40.599 − 36 =

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