Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 387 · 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. 1.172 − 17 =
2. 2.99 − 86 =
3. 3.369 − 78 =
4. 4.445 − 88 =
5. 5.381 − 26 =
6. 6.551 − 98 =
7. 7.274 − 99 =
8. 8.197 − 47 =
9. 9.507 − 78 =
10. 10.138 − 16 =
11. 11.577 − 36 =
12. 12.336 − 89 =
13. 13.336 − 39 =
14. 14.355 − 26 =
15. 15.523 − 16 =
16. 16.436 − 99 =
17. 17.487 − 47 =
18. 18.190 − 36 =
19. 19.161 − 18 =
20. 20.254 − 86 =
21. 21.426 − 89 =
22. 22.310 − 76 =
23. 23.418 − 46 =
24. 24.413 − 67 =
25. 25.445 − 17 =
26. 26.247 − 88 =
27. 27.461 − 99 =
28. 28.442 − 98 =
29. 29.458 − 58 =
30. 30.256 − 26 =
31. 31.264 − 26 =
32. 32.510 − 48 =
33. 33.355 − 37 =
34. 34.358 − 57 =
35. 35.399 − 86 =
36. 36.119 − 29 =
37. 37.109 − 76 =
38. 38.161 − 57 =
39. 39.556 − 18 =
40. 40.168 − 69 =

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