Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 50 · 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. 1.535 − 18 =
2. 2.531 − 17 =
3. 3.155 − 36 =
4. 4.420 − 27 =
5. 5.523 − 86 =
6. 6.224 − 48 =
7. 7.103 − 76 =
8. 8.262 − 19 =
9. 9.571 − 96 =
10. 10.219 − 89 =
11. 11.552 − 39 =
12. 12.426 − 28 =
13. 13.160 − 36 =
14. 14.425 − 16 =
15. 15.134 − 18 =
16. 16.509 − 26 =
17. 17.244 − 29 =
18. 18.187 − 16 =
19. 19.321 − 56 =
20. 20.373 − 88 =
21. 21.308 − 77 =
22. 22.579 − 87 =
23. 23.154 − 67 =
24. 24.156 − 77 =
25. 25.136 − 67 =
26. 26.502 − 18 =
27. 27.71 − 36 =
28. 28.398 − 68 =
29. 29.538 − 66 =
30. 30.90 − 26 =
31. 31.180 − 76 =
32. 32.325 − 58 =
33. 33.168 − 39 =
34. 34.353 − 98 =
35. 35.474 − 18 =
36. 36.553 − 66 =
37. 37.547 − 47 =
38. 38.390 − 76 =
39. 39.359 − 78 =
40. 40.250 − 46 =

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