Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 946 · 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. 1.349 − 77 =
2. 2.294 − 57 =
3. 3.83 − 39 =
4. 4.379 − 69 =
5. 5.73 − 27 =
6. 6.242 − 69 =
7. 7.435 − 17 =
8. 8.116 − 88 =
9. 9.193 − 26 =
10. 10.307 − 66 =
11. 11.326 − 16 =
12. 12.206 − 67 =
13. 13.472 − 58 =
14. 14.77 − 56 =
15. 15.580 − 98 =
16. 16.415 − 48 =
17. 17.365 − 29 =
18. 18.520 − 16 =
19. 19.408 − 79 =
20. 20.477 − 27 =
21. 21.110 − 28 =
22. 22.576 − 98 =
23. 23.203 − 36 =
24. 24.289 − 76 =
25. 25.341 − 97 =
26. 26.208 − 68 =
27. 27.337 − 86 =
28. 28.165 − 99 =
29. 29.558 − 16 =
30. 30.489 − 78 =
31. 31.276 − 29 =
32. 32.386 − 96 =
33. 33.227 − 98 =
34. 34.564 − 79 =
35. 35.249 − 98 =
36. 36.342 − 26 =
37. 37.224 − 16 =
38. 38.322 − 36 =
39. 39.404 − 48 =
40. 40.158 − 39 =

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