Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 66 · 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 − 57 =
2. 2.170 − 99 =
3. 3.147 − 89 =
4. 4.413 − 49 =
5. 5.510 − 88 =
6. 6.441 − 67 =
7. 7.164 − 57 =
8. 8.581 − 68 =
9. 9.473 − 18 =
10. 10.391 − 17 =
11. 11.431 − 57 =
12. 12.83 − 79 =
13. 13.409 − 67 =
14. 14.88 − 66 =
15. 15.61 − 59 =
16. 16.112 − 67 =
17. 17.137 − 47 =
18. 18.448 − 77 =
19. 19.335 − 28 =
20. 20.89 − 69 =
21. 21.419 − 86 =
22. 22.552 − 17 =
23. 23.352 − 78 =
24. 24.427 − 59 =
25. 25.455 − 96 =
26. 26.288 − 96 =
27. 27.512 − 46 =
28. 28.376 − 36 =
29. 29.322 − 26 =
30. 30.295 − 58 =
31. 31.344 − 49 =
32. 32.116 − 77 =
33. 33.457 − 79 =
34. 34.299 − 99 =
35. 35.246 − 98 =
36. 36.131 − 57 =
37. 37.496 − 38 =
38. 38.58 − 48 =
39. 39.330 − 67 =
40. 40.217 − 77 =

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