Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 421 · 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. 1.356 − 77 =
2. 2.226 − 49 =
3. 3.217 − 89 =
4. 4.264 − 66 =
5. 5.345 − 86 =
6. 6.470 − 99 =
7. 7.119 − 48 =
8. 8.423 − 46 =
9. 9.379 − 89 =
10. 10.221 − 36 =
11. 11.300 − 49 =
12. 12.329 − 87 =
13. 13.340 − 48 =
14. 14.483 − 59 =
15. 15.396 − 46 =
16. 16.408 − 16 =
17. 17.127 − 86 =
18. 18.583 − 16 =
19. 19.357 − 87 =
20. 20.333 − 29 =
21. 21.512 − 39 =
22. 22.125 − 46 =
23. 23.128 − 19 =
24. 24.516 − 58 =
25. 25.365 − 78 =
26. 26.168 − 77 =
27. 27.415 − 39 =
28. 28.508 − 89 =
29. 29.516 − 17 =
30. 30.99 − 37 =
31. 31.73 − 48 =
32. 32.81 − 59 =
33. 33.280 − 68 =
34. 34.273 − 47 =
35. 35.455 − 98 =
36. 36.564 − 36 =
37. 37.568 − 89 =
38. 38.563 − 56 =
39. 39.90 − 37 =
40. 40.544 − 49 =

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