Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 80 · 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. 1.178 − 98 =
2. 2.382 − 58 =
3. 3.245 − 39 =
4. 4.411 − 26 =
5. 5.86 − 26 =
6. 6.230 − 88 =
7. 7.284 − 36 =
8. 8.394 − 16 =
9. 9.372 − 46 =
10. 10.301 − 86 =
11. 11.237 − 96 =
12. 12.535 − 87 =
13. 13.321 − 69 =
14. 14.378 − 48 =
15. 15.233 − 48 =
16. 16.348 − 16 =
17. 17.409 − 16 =
18. 18.462 − 16 =
19. 19.512 − 66 =
20. 20.589 − 28 =
21. 21.57 − 56 =
22. 22.118 − 68 =
23. 23.217 − 66 =
24. 24.281 − 27 =
25. 25.140 − 46 =
26. 26.575 − 89 =
27. 27.580 − 58 =
28. 28.349 − 56 =
29. 29.146 − 27 =
30. 30.566 − 96 =
31. 31.217 − 48 =
32. 32.289 − 66 =
33. 33.151 − 89 =
34. 34.99 − 89 =
35. 35.101 − 26 =
36. 36.304 − 56 =
37. 37.300 − 99 =
38. 38.580 − 57 =
39. 39.152 − 56 =
40. 40.452 − 17 =

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