Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 507 · 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. 1.129 − 56 =
2. 2.174 − 17 =
3. 3.324 − 88 =
4. 4.184 − 98 =
5. 5.70 − 66 =
6. 6.326 − 99 =
7. 7.102 − 27 =
8. 8.148 − 69 =
9. 9.521 − 86 =
10. 10.185 − 86 =
11. 11.174 − 99 =
12. 12.159 − 56 =
13. 13.355 − 28 =
14. 14.63 − 58 =
15. 15.285 − 37 =
16. 16.388 − 26 =
17. 17.438 − 68 =
18. 18.166 − 18 =
19. 19.524 − 89 =
20. 20.428 − 46 =
21. 21.102 − 59 =
22. 22.296 − 89 =
23. 23.182 − 97 =
24. 24.83 − 18 =
25. 25.128 − 36 =
26. 26.481 − 59 =
27. 27.84 − 29 =
28. 28.461 − 16 =
29. 29.316 − 68 =
30. 30.594 − 68 =
31. 31.319 − 56 =
32. 32.583 − 36 =
33. 33.319 − 86 =
34. 34.398 − 68 =
35. 35.531 − 36 =
36. 36.213 − 16 =
37. 37.164 − 47 =
38. 38.558 − 87 =
39. 39.479 − 29 =
40. 40.205 − 68 =

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