Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 151 · 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. 1.219 − 79 =
2. 2.110 − 67 =
3. 3.103 − 16 =
4. 4.239 − 88 =
5. 5.239 − 28 =
6. 6.377 − 16 =
7. 7.244 − 18 =
8. 8.252 − 27 =
9. 9.78 − 77 =
10. 10.393 − 47 =
11. 11.572 − 68 =
12. 12.275 − 56 =
13. 13.527 − 79 =
14. 14.573 − 49 =
15. 15.314 − 28 =
16. 16.251 − 76 =
17. 17.294 − 46 =
18. 18.226 − 29 =
19. 19.327 − 96 =
20. 20.429 − 79 =
21. 21.83 − 79 =
22. 22.278 − 18 =
23. 23.590 − 17 =
24. 24.281 − 87 =
25. 25.192 − 87 =
26. 26.368 − 49 =
27. 27.57 − 38 =
28. 28.163 − 67 =
29. 29.140 − 78 =
30. 30.276 − 68 =
31. 31.364 − 47 =
32. 32.157 − 58 =
33. 33.440 − 38 =
34. 34.400 − 79 =
35. 35.595 − 18 =
36. 36.207 − 19 =
37. 37.55 − 48 =
38. 38.559 − 88 =
39. 39.383 − 29 =
40. 40.137 − 27 =

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