Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 110 · 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. 1.331 − 68 =
2. 2.509 − 29 =
3. 3.217 − 19 =
4. 4.259 − 18 =
5. 5.232 − 67 =
6. 6.368 − 88 =
7. 7.235 − 18 =
8. 8.511 − 78 =
9. 9.97 − 39 =
10. 10.496 − 27 =
11. 11.235 − 97 =
12. 12.303 − 37 =
13. 13.244 − 49 =
14. 14.146 − 66 =
15. 15.500 − 59 =
16. 16.172 − 56 =
17. 17.90 − 67 =
18. 18.93 − 56 =
19. 19.500 − 46 =
20. 20.457 − 56 =
21. 21.156 − 68 =
22. 22.176 − 47 =
23. 23.534 − 26 =
24. 24.123 − 56 =
25. 25.281 − 67 =
26. 26.398 − 57 =
27. 27.197 − 49 =
28. 28.513 − 89 =
29. 29.144 − 79 =
30. 30.176 − 86 =
31. 31.470 − 69 =
32. 32.55 − 39 =
33. 33.80 − 16 =
34. 34.482 − 27 =
35. 35.387 − 57 =
36. 36.438 − 48 =
37. 37.593 − 47 =
38. 38.582 − 29 =
39. 39.242 − 37 =
40. 40.528 − 28 =

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