Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 878 · 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. 1.500 − 88 =
2. 2.599 − 66 =
3. 3.129 − 68 =
4. 4.242 − 49 =
5. 5.508 − 18 =
6. 6.367 − 29 =
7. 7.96 − 17 =
8. 8.506 − 88 =
9. 9.130 − 38 =
10. 10.152 − 16 =
11. 11.181 − 38 =
12. 12.581 − 29 =
13. 13.414 − 26 =
14. 14.120 − 16 =
15. 15.358 − 17 =
16. 16.383 − 68 =
17. 17.463 − 57 =
18. 18.196 − 37 =
19. 19.210 − 67 =
20. 20.322 − 56 =
21. 21.488 − 38 =
22. 22.443 − 46 =
23. 23.288 − 46 =
24. 24.103 − 58 =
25. 25.337 − 46 =
26. 26.195 − 58 =
27. 27.193 − 38 =
28. 28.158 − 26 =
29. 29.184 − 87 =
30. 30.523 − 49 =
31. 31.164 − 66 =
32. 32.581 − 87 =
33. 33.239 − 99 =
34. 34.399 − 19 =
35. 35.186 − 17 =
36. 36.598 − 39 =
37. 37.348 − 67 =
38. 38.396 − 27 =
39. 39.380 − 57 =
40. 40.327 − 88 =

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