Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 287 · 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. 1.398 − 18 =
2. 2.118 − 87 =
3. 3.484 − 26 =
4. 4.569 − 17 =
5. 5.250 − 77 =
6. 6.474 − 27 =
7. 7.234 − 96 =
8. 8.497 − 28 =
9. 9.278 − 19 =
10. 10.288 − 66 =
11. 11.116 − 46 =
12. 12.391 − 99 =
13. 13.124 − 88 =
14. 14.372 − 56 =
15. 15.115 − 76 =
16. 16.459 − 49 =
17. 17.340 − 49 =
18. 18.118 − 49 =
19. 19.231 − 19 =
20. 20.591 − 96 =
21. 21.132 − 99 =
22. 22.175 − 88 =
23. 23.232 − 57 =
24. 24.160 − 79 =
25. 25.158 − 97 =
26. 26.599 − 86 =
27. 27.255 − 66 =
28. 28.443 − 86 =
29. 29.245 − 47 =
30. 30.333 − 28 =
31. 31.211 − 36 =
32. 32.313 − 78 =
33. 33.368 − 98 =
34. 34.340 − 99 =
35. 35.201 − 66 =
36. 36.492 − 28 =
37. 37.117 − 17 =
38. 38.432 − 79 =
39. 39.393 − 37 =
40. 40.193 − 97 =

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