Practice Workbook SE - East Penn School District
Practice Workbook SE - East Penn School District
Practice Workbook SE - East Penn School District
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Name<br />
LESSON 3.2<br />
Use Mental Math Strategies<br />
For 1–4, use the break apart strategy.<br />
1. 49 16 2. 73 43 3. 46 12 4. 91 63<br />
For 5–8, use the make a ten strategy.<br />
5. 94 56 6. 88 31 7. 72 39 8. 84 46<br />
For 9–28, add or subtract mentally. Tell the strategy you used.<br />
9. 78 46 10. 61 16 11. 40 24 12. 37 19<br />
13. 64 28 14. 45 48 15. 58 32 16. 67 43<br />
17. 82 53 18. 66 27 19. 53 23 20. 75 61<br />
21. 51 38 22. 49 21 23. 82 46 24. 49 31<br />
25. 83 72 26. 28 19 27. 93 38 28. 26 23<br />
© Harcourt<br />
Mixed Review<br />
Round each number to the place given.<br />
29. 568,303; ten thousand 30. 35,405,203; million 31. 596,305,003; ten million<br />
Write the numbers in order from least to greatest.<br />
32. 568,394; 395,205; 562,304<br />
33. 458,404,305; 451,402,305; 455,305,203<br />
<strong>Practice</strong><br />
PW11