Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 58 · 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. 1.564 − 68 =
2. 2.415 − 19 =
3. 3.166 − 86 =
4. 4.186 − 16 =
5. 5.575 − 36 =
6. 6.93 − 39 =
7. 7.595 − 36 =
8. 8.345 − 57 =
9. 9.250 − 57 =
10. 10.330 − 58 =
11. 11.289 − 87 =
12. 12.452 − 59 =
13. 13.89 − 68 =
14. 14.329 − 66 =
15. 15.401 − 46 =
16. 16.416 − 27 =
17. 17.381 − 18 =
18. 18.158 − 78 =
19. 19.371 − 88 =
20. 20.431 − 89 =
21. 21.196 − 56 =
22. 22.392 − 86 =
23. 23.562 − 56 =
24. 24.128 − 56 =
25. 25.193 − 99 =
26. 26.379 − 86 =
27. 27.520 − 37 =
28. 28.95 − 39 =
29. 29.184 − 38 =
30. 30.439 − 67 =
31. 31.326 − 26 =
32. 32.353 − 78 =
33. 33.398 − 57 =
34. 34.531 − 68 =
35. 35.543 − 89 =
36. 36.254 − 99 =
37. 37.266 − 46 =
38. 38.208 − 46 =
39. 39.480 − 88 =
40. 40.443 − 28 =

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