Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 749 · 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. 1.309 − 79 =
2. 2.172 − 57 =
3. 3.173 − 76 =
4. 4.394 − 47 =
5. 5.372 − 29 =
6. 6.115 − 19 =
7. 7.383 − 99 =
8. 8.443 − 99 =
9. 9.370 − 66 =
10. 10.197 − 48 =
11. 11.343 − 48 =
12. 12.481 − 48 =
13. 13.423 − 99 =
14. 14.166 − 67 =
15. 15.377 − 17 =
16. 16.518 − 78 =
17. 17.147 − 89 =
18. 18.252 − 58 =
19. 19.491 − 57 =
20. 20.444 − 49 =
21. 21.53 − 19 =
22. 22.473 − 79 =
23. 23.120 − 67 =
24. 24.152 − 98 =
25. 25.85 − 16 =
26. 26.87 − 76 =
27. 27.176 − 96 =
28. 28.166 − 27 =
29. 29.129 − 39 =
30. 30.455 − 66 =
31. 31.501 − 48 =
32. 32.410 − 16 =
33. 33.421 − 17 =
34. 34.544 − 98 =
35. 35.181 − 16 =
36. 36.459 − 17 =
37. 37.531 − 47 =
38. 38.180 − 26 =
39. 39.391 − 16 =
40. 40.156 − 69 =

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