Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 870 · 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. 1.507 − 27 =
2. 2.322 − 88 =
3. 3.270 − 37 =
4. 4.546 − 86 =
5. 5.552 − 58 =
6. 6.528 − 46 =
7. 7.191 − 38 =
8. 8.117 − 29 =
9. 9.512 − 66 =
10. 10.100 − 59 =
11. 11.482 − 98 =
12. 12.135 − 48 =
13. 13.302 − 58 =
14. 14.135 − 87 =
15. 15.521 − 79 =
16. 16.170 − 26 =
17. 17.128 − 98 =
18. 18.191 − 97 =
19. 19.521 − 78 =
20. 20.298 − 28 =
21. 21.351 − 38 =
22. 22.296 − 28 =
23. 23.403 − 77 =
24. 24.201 − 29 =
25. 25.134 − 57 =
26. 26.140 − 49 =
27. 27.353 − 59 =
28. 28.236 − 37 =
29. 29.158 − 77 =
30. 30.360 − 29 =
31. 31.344 − 18 =
32. 32.333 − 97 =
33. 33.153 − 58 =
34. 34.202 − 29 =
35. 35.584 − 49 =
36. 36.248 − 66 =
37. 37.595 − 67 =
38. 38.260 − 79 =
39. 39.352 − 46 =
40. 40.168 − 99 =

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