Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 306 · 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. 1.180 − 97 =
2. 2.252 − 97 =
3. 3.409 − 79 =
4. 4.539 − 66 =
5. 5.573 − 36 =
6. 6.255 − 57 =
7. 7.432 − 27 =
8. 8.213 − 37 =
9. 9.120 − 19 =
10. 10.127 − 19 =
11. 11.400 − 68 =
12. 12.221 − 38 =
13. 13.131 − 29 =
14. 14.361 − 48 =
15. 15.374 − 48 =
16. 16.401 − 67 =
17. 17.590 − 48 =
18. 18.230 − 66 =
19. 19.298 − 76 =
20. 20.452 − 59 =
21. 21.304 − 37 =
22. 22.357 − 67 =
23. 23.93 − 56 =
24. 24.293 − 36 =
25. 25.207 − 26 =
26. 26.418 − 58 =
27. 27.503 − 18 =
28. 28.491 − 56 =
29. 29.449 − 29 =
30. 30.134 − 16 =
31. 31.204 − 46 =
32. 32.490 − 27 =
33. 33.479 − 78 =
34. 34.159 − 67 =
35. 35.324 − 19 =
36. 36.219 − 58 =
37. 37.543 − 16 =
38. 38.145 − 46 =
39. 39.459 − 37 =
40. 40.403 − 19 =

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