Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 608 · 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. 1.390 − 38 =
2. 2.159 − 39 =
3. 3.105 − 99 =
4. 4.288 − 86 =
5. 5.328 − 29 =
6. 6.508 − 76 =
7. 7.358 − 98 =
8. 8.448 − 28 =
9. 9.529 − 38 =
10. 10.313 − 36 =
11. 11.140 − 66 =
12. 12.428 − 99 =
13. 13.162 − 26 =
14. 14.139 − 69 =
15. 15.328 − 96 =
16. 16.138 − 48 =
17. 17.367 − 67 =
18. 18.133 − 37 =
19. 19.333 − 76 =
20. 20.166 − 89 =
21. 21.279 − 99 =
22. 22.251 − 98 =
23. 23.195 − 19 =
24. 24.192 − 19 =
25. 25.246 − 88 =
26. 26.111 − 66 =
27. 27.183 − 89 =
28. 28.338 − 89 =
29. 29.182 − 99 =
30. 30.581 − 96 =
31. 31.162 − 89 =
32. 32.352 − 77 =
33. 33.209 − 87 =
34. 34.121 − 26 =
35. 35.246 − 87 =
36. 36.80 − 77 =
37. 37.85 − 58 =
38. 38.597 − 57 =
39. 39.363 − 27 =
40. 40.122 − 17 =

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