Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 850 · 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. 1.232 − 39 =
2. 2.134 − 27 =
3. 3.355 − 57 =
4. 4.102 − 99 =
5. 5.221 − 28 =
6. 6.593 − 19 =
7. 7.509 − 36 =
8. 8.377 − 29 =
9. 9.506 − 49 =
10. 10.156 − 58 =
11. 11.580 − 78 =
12. 12.552 − 58 =
13. 13.95 − 27 =
14. 14.78 − 36 =
15. 15.201 − 28 =
16. 16.204 − 47 =
17. 17.89 − 19 =
18. 18.527 − 19 =
19. 19.301 − 68 =
20. 20.501 − 87 =
21. 21.166 − 96 =
22. 22.158 − 87 =
23. 23.376 − 98 =
24. 24.175 − 38 =
25. 25.327 − 68 =
26. 26.423 − 37 =
27. 27.355 − 18 =
28. 28.385 − 28 =
29. 29.468 − 38 =
30. 30.56 − 38 =
31. 31.92 − 66 =
32. 32.306 − 76 =
33. 33.76 − 59 =
34. 34.311 − 39 =
35. 35.139 − 76 =
36. 36.517 − 66 =
37. 37.170 − 19 =
38. 38.251 − 87 =
39. 39.453 − 39 =
40. 40.153 − 59 =

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