Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 860 · 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. 1.77 − 66 =
2. 2.113 − 39 =
3. 3.327 − 68 =
4. 4.361 − 57 =
5. 5.374 − 18 =
6. 6.280 − 79 =
7. 7.133 − 97 =
8. 8.173 − 47 =
9. 9.100 − 99 =
10. 10.101 − 78 =
11. 11.161 − 87 =
12. 12.128 − 49 =
13. 13.320 − 39 =
14. 14.488 − 19 =
15. 15.458 − 76 =
16. 16.565 − 86 =
17. 17.312 − 19 =
18. 18.204 − 67 =
19. 19.229 − 37 =
20. 20.548 − 16 =
21. 21.140 − 37 =
22. 22.420 − 37 =
23. 23.377 − 28 =
24. 24.364 − 89 =
25. 25.354 − 79 =
26. 26.478 − 27 =
27. 27.496 − 76 =
28. 28.269 − 16 =
29. 29.556 − 76 =
30. 30.186 − 17 =
31. 31.61 − 56 =
32. 32.159 − 47 =
33. 33.172 − 77 =
34. 34.465 − 66 =
35. 35.488 − 39 =
36. 36.146 − 47 =
37. 37.152 − 69 =
38. 38.294 − 86 =
39. 39.178 − 87 =
40. 40.529 − 36 =

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