Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 681 · 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. 1.179 − 99 =
2. 2.61 − 38 =
3. 3.477 − 29 =
4. 4.345 − 49 =
5. 5.370 − 27 =
6. 6.274 − 87 =
7. 7.187 − 97 =
8. 8.285 − 36 =
9. 9.213 − 27 =
10. 10.521 − 86 =
11. 11.404 − 16 =
12. 12.54 − 36 =
13. 13.132 − 37 =
14. 14.344 − 27 =
15. 15.138 − 16 =
16. 16.560 − 26 =
17. 17.155 − 59 =
18. 18.516 − 67 =
19. 19.368 − 59 =
20. 20.589 − 26 =
21. 21.248 − 97 =
22. 22.209 − 18 =
23. 23.512 − 87 =
24. 24.249 − 18 =
25. 25.570 − 88 =
26. 26.66 − 47 =
27. 27.397 − 49 =
28. 28.166 − 97 =
29. 29.91 − 79 =
30. 30.345 − 29 =
31. 31.277 − 39 =
32. 32.181 − 39 =
33. 33.81 − 38 =
34. 34.561 − 66 =
35. 35.410 − 28 =
36. 36.369 − 19 =
37. 37.217 − 46 =
38. 38.496 − 99 =
39. 39.458 − 49 =
40. 40.224 − 26 =

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