Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 724 · 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. 1.161 − 79 =
2. 2.238 − 67 =
3. 3.443 − 56 =
4. 4.412 − 16 =
5. 5.526 − 78 =
6. 6.408 − 99 =
7. 7.449 − 88 =
8. 8.512 − 49 =
9. 9.329 − 58 =
10. 10.596 − 17 =
11. 11.533 − 36 =
12. 12.374 − 66 =
13. 13.280 − 56 =
14. 14.440 − 99 =
15. 15.181 − 47 =
16. 16.70 − 66 =
17. 17.144 − 47 =
18. 18.508 − 37 =
19. 19.570 − 49 =
20. 20.277 − 19 =
21. 21.295 − 88 =
22. 22.426 − 38 =
23. 23.435 − 76 =
24. 24.199 − 36 =
25. 25.416 − 17 =
26. 26.310 − 47 =
27. 27.57 − 29 =
28. 28.157 − 77 =
29. 29.437 − 96 =
30. 30.581 − 86 =
31. 31.220 − 86 =
32. 32.98 − 78 =
33. 33.69 − 29 =
34. 34.118 − 37 =
35. 35.348 − 96 =
36. 36.134 − 36 =
37. 37.73 − 28 =
38. 38.355 − 38 =
39. 39.243 − 16 =
40. 40.506 − 66 =

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