Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 68 · 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. 1.528 − 28 =
2. 2.170 − 38 =
3. 3.388 − 27 =
4. 4.303 − 16 =
5. 5.150 − 36 =
6. 6.102 − 27 =
7. 7.75 − 29 =
8. 8.588 − 78 =
9. 9.313 − 16 =
10. 10.178 − 86 =
11. 11.410 − 66 =
12. 12.253 − 16 =
13. 13.564 − 88 =
14. 14.529 − 56 =
15. 15.513 − 69 =
16. 16.518 − 59 =
17. 17.453 − 76 =
18. 18.57 − 38 =
19. 19.585 − 77 =
20. 20.487 − 87 =
21. 21.536 − 88 =
22. 22.523 − 59 =
23. 23.231 − 96 =
24. 24.439 − 76 =
25. 25.67 − 47 =
26. 26.488 − 47 =
27. 27.56 − 47 =
28. 28.316 − 36 =
29. 29.382 − 48 =
30. 30.158 − 56 =
31. 31.103 − 47 =
32. 32.174 − 58 =
33. 33.390 − 68 =
34. 34.274 − 48 =
35. 35.127 − 39 =
36. 36.193 − 88 =
37. 37.557 − 29 =
38. 38.120 − 86 =
39. 39.164 − 97 =
40. 40.129 − 27 =

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