Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 561 · 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. 1.202 − 47 =
2. 2.188 − 38 =
3. 3.577 − 36 =
4. 4.466 − 19 =
5. 5.275 − 18 =
6. 6.510 − 96 =
7. 7.366 − 36 =
8. 8.512 − 37 =
9. 9.409 − 98 =
10. 10.164 − 88 =
11. 11.164 − 79 =
12. 12.345 − 97 =
13. 13.146 − 47 =
14. 14.491 − 58 =
15. 15.514 − 48 =
16. 16.177 − 17 =
17. 17.193 − 68 =
18. 18.360 − 66 =
19. 19.278 − 87 =
20. 20.568 − 76 =
21. 21.205 − 69 =
22. 22.310 − 78 =
23. 23.339 − 69 =
24. 24.239 − 77 =
25. 25.424 − 29 =
26. 26.380 − 87 =
27. 27.504 − 39 =
28. 28.241 − 66 =
29. 29.460 − 48 =
30. 30.482 − 46 =
31. 31.370 − 69 =
32. 32.296 − 77 =
33. 33.201 − 37 =
34. 34.277 − 27 =
35. 35.223 − 66 =
36. 36.298 − 17 =
37. 37.429 − 17 =
38. 38.521 − 48 =
39. 39.288 − 39 =
40. 40.397 − 27 =

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