Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 808 · 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. 1.426 − 77 =
2. 2.234 − 37 =
3. 3.199 − 66 =
4. 4.133 − 57 =
5. 5.543 − 87 =
6. 6.176 − 56 =
7. 7.282 − 18 =
8. 8.211 − 77 =
9. 9.555 − 98 =
10. 10.111 − 56 =
11. 11.381 − 37 =
12. 12.425 − 26 =
13. 13.559 − 27 =
14. 14.389 − 89 =
15. 15.116 − 99 =
16. 16.217 − 47 =
17. 17.177 − 47 =
18. 18.214 − 47 =
19. 19.331 − 58 =
20. 20.97 − 78 =
21. 21.302 − 78 =
22. 22.474 − 39 =
23. 23.297 − 27 =
24. 24.155 − 17 =
25. 25.105 − 38 =
26. 26.459 − 67 =
27. 27.134 − 18 =
28. 28.281 − 79 =
29. 29.175 − 78 =
30. 30.291 − 79 =
31. 31.579 − 78 =
32. 32.184 − 58 =
33. 33.407 − 49 =
34. 34.411 − 89 =
35. 35.196 − 86 =
36. 36.502 − 87 =
37. 37.396 − 69 =
38. 38.102 − 88 =
39. 39.323 − 27 =
40. 40.314 − 17 =

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