Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 90 · 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. 1.442 − 98 =
2. 2.228 − 98 =
3. 3.168 − 67 =
4. 4.168 − 97 =
5. 5.517 − 26 =
6. 6.147 − 99 =
7. 7.552 − 19 =
8. 8.324 − 98 =
9. 9.570 − 78 =
10. 10.273 − 48 =
11. 11.341 − 86 =
12. 12.527 − 27 =
13. 13.531 − 96 =
14. 14.410 − 26 =
15. 15.575 − 88 =
16. 16.413 − 76 =
17. 17.390 − 27 =
18. 18.91 − 76 =
19. 19.427 − 96 =
20. 20.104 − 28 =
21. 21.223 − 18 =
22. 22.397 − 47 =
23. 23.304 − 47 =
24. 24.528 − 29 =
25. 25.237 − 79 =
26. 26.69 − 29 =
27. 27.156 − 58 =
28. 28.389 − 18 =
29. 29.594 − 86 =
30. 30.90 − 26 =
31. 31.205 − 97 =
32. 32.266 − 87 =
33. 33.104 − 86 =
34. 34.304 − 37 =
35. 35.380 − 28 =
36. 36.304 − 69 =
37. 37.257 − 38 =
38. 38.400 − 47 =
39. 39.218 − 68 =
40. 40.526 − 79 =

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