Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 438 · 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. 1.408 − 46 =
2. 2.147 − 28 =
3. 3.522 − 98 =
4. 4.507 − 77 =
5. 5.180 − 98 =
6. 6.170 − 58 =
7. 7.339 − 48 =
8. 8.493 − 68 =
9. 9.173 − 36 =
10. 10.561 − 59 =
11. 11.590 − 18 =
12. 12.490 − 77 =
13. 13.266 − 26 =
14. 14.435 − 77 =
15. 15.98 − 86 =
16. 16.266 − 38 =
17. 17.523 − 58 =
18. 18.55 − 39 =
19. 19.432 − 38 =
20. 20.159 − 68 =
21. 21.103 − 49 =
22. 22.205 − 59 =
23. 23.168 − 46 =
24. 24.96 − 27 =
25. 25.531 − 59 =
26. 26.310 − 76 =
27. 27.541 − 56 =
28. 28.85 − 58 =
29. 29.149 − 56 =
30. 30.535 − 88 =
31. 31.207 − 27 =
32. 32.390 − 58 =
33. 33.204 − 39 =
34. 34.567 − 98 =
35. 35.187 − 97 =
36. 36.325 − 29 =
37. 37.234 − 27 =
38. 38.432 − 38 =
39. 39.517 − 86 =
40. 40.339 − 48 =

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