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Name________________________________ LESSON 2-1 Date _______________________ Class __________________ Review for Mastery Integers This number line shows integers. Every integer has an opposite integer. A number and its opposite are the same distance from 0. 2. How many units is 4 from 0? ________ 1. How many units is 4 from 0? ________ 3. 4 and 4 are called ___________________________________________________________________. Graph each integer and its opposite on a number line. 5. 3 4. 2 You can use a number line to compare and order numbers. The numbers get greater as you move to the right on the number line. 6. What is the order from least to greatest of 1, 2, and 3? ____________________________ Write the integers in order from least to greatest. 7. 2; 6; 4 8. 3; 7; 1 _______________________________________ ________________________________________ The absolute value of an integer is its distance from 0 on a number line. 5 is 5 units from 0. The absolute value of 5 is 5. You write 5 5. 9. How many units from 0 is 3? ________________________________________________________ Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. 8 Holt McDougal Mathematics LESSON 2-1 Practice B Integers Graph each integer and its opposite on a number line. 2. 7 1. 8 Compare the integers. Use < or >. 3. 15 ___ 7 4. 8 ___ 8 5. 14 ___ 13 6. 18 ___ 20 Use a number line to order the integers from least to greatest. 7. 1; 4; 5; 7; 3 8. 6; 8; 0; 4; 2 _______________________________________ 9. 6; 5; 7; 8; 2 ________________________________________ 10. 1; 3; 4; 5; 7 _______________________________________ ________________________________________ Use a number line to find each absolute value. 11. 18 ________ 12. 11 ________ 13. 25 15. 10 ________ 16. 16 ________ 17. 22 ________ 18. 14 21. 7 ________ 22. 17 19. 9 ________ 20. 24 ________ 14. 19 ________ ________ ________ ________ 23. Christy dove to a depth of 12 feet below the surface of the water. Write the depth as an integer. ________________________________________________________________________________________ 24. The highest point in North Carolina is Mt. Mitchell, with a height of 6,684 feet. Write the height of Mt. Mitchell as an integer. ________________________________________________________________________________________ Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. Holt McDougal Mathematics