Skills Practice Workbook - Glencoe

2–1
NAME DATE PERIOD
Skills Practice
Real Numbers and Number Lines
Write a real number with five digits to the right of the decimal point.
1-8. Sample answers given.
1. an irrational number between 2 and 3 2.43473. . .
2. a rational number between �2 and �3 with a 2-digit repeating pattern
�2.57575. . .
3. two rational numbers between 3 and 4 3.01265 and 3.78659
4. an irrational number greater than 10 11.12123. . .
5. a rational number greater than 15 but less than 20 18.97531
6. an irrational number less than 30 26.54854. . .
7. an irrational number less than �5 �6.10100. . .
8. a rational number greater than �8 with a 2-digit repeating pattern
�6.13131. . .
Use a number line to find each measure.
L A Z Q M S T B Y X
�5 �4 �3 �2 �1 0 1 2 3 4 5
9. LX 10 10. TX 4 11. ZT 3 12. LZ 3
1
1
13. QM 1 14. MS 1 15. BX 2� 16. BT 1�
2
2
1
1
1
1
17. ST � 18. LQ 3� 19. BY � 20. AX 8�
2
2
2
2
Consider 0.27, 0.27�, and 0.2�7�.
21. How are these numbers alike? All three numbers are rational.
22. How are they different? 0.27 � 0.27; 0.27� � 0.277777. . . ; 0.2�7� � 0.27272727. . .
23. Which number is greatest? 0.27�
24. How would you read each number? Sample answers: Read 0.27 as
27 hundredths. Read 0.27� as zero point two seven repeating. Read 0.2�7�
as zero point two seven all repeating.
© Glencoe/McGraw-Hill 7 Geometry: Concepts and Applications