Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 509 · 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. 1.132 − 88 =
2. 2.369 − 19 =
3. 3.245 − 16 =
4. 4.556 − 37 =
5. 5.509 − 48 =
6. 6.554 − 39 =
7. 7.173 − 29 =
8. 8.554 − 28 =
9. 9.297 − 56 =
10. 10.347 − 39 =
11. 11.576 − 88 =
12. 12.416 − 29 =
13. 13.475 − 98 =
14. 14.485 − 46 =
15. 15.321 − 16 =
16. 16.486 − 89 =
17. 17.518 − 29 =
18. 18.173 − 99 =
19. 19.106 − 58 =
20. 20.163 − 39 =
21. 21.116 − 66 =
22. 22.62 − 46 =
23. 23.290 − 59 =
24. 24.507 − 66 =
25. 25.578 − 79 =
26. 26.324 − 19 =
27. 27.493 − 66 =
28. 28.362 − 97 =
29. 29.90 − 36 =
30. 30.181 − 19 =
31. 31.305 − 58 =
32. 32.230 − 49 =
33. 33.324 − 47 =
34. 34.111 − 19 =
35. 35.104 − 39 =
36. 36.493 − 26 =
37. 37.86 − 59 =
38. 38.517 − 18 =
39. 39.206 − 29 =
40. 40.371 − 79 =

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