Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 991 · 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. 1.542 − 28 =
2. 2.165 − 27 =
3. 3.97 − 27 =
4. 4.582 − 66 =
5. 5.151 − 46 =
6. 6.63 − 16 =
7. 7.540 − 67 =
8. 8.166 − 56 =
9. 9.123 − 66 =
10. 10.313 − 38 =
11. 11.453 − 97 =
12. 12.450 − 76 =
13. 13.405 − 59 =
14. 14.246 − 19 =
15. 15.476 − 16 =
16. 16.518 − 37 =
17. 17.349 − 88 =
18. 18.353 − 18 =
19. 19.373 − 28 =
20. 20.314 − 66 =
21. 21.162 − 98 =
22. 22.360 − 19 =
23. 23.580 − 98 =
24. 24.388 − 36 =
25. 25.219 − 28 =
26. 26.179 − 99 =
27. 27.214 − 66 =
28. 28.124 − 28 =
29. 29.248 − 28 =
30. 30.225 − 16 =
31. 31.79 − 68 =
32. 32.417 − 27 =
33. 33.590 − 86 =
34. 34.157 − 46 =
35. 35.411 − 88 =
36. 36.173 − 99 =
37. 37.572 − 49 =
38. 38.541 − 19 =
39. 39.213 − 17 =
40. 40.139 − 98 =

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