7th Grade Math

PART A BC

Rational Numbers

Multi-Part

Lesson 1

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Lesson 1A Rational Numbers 127

The Number Line

You have already graphed integers and positive fractions on a

number line. In this Activity, you will graph negative fractions.

Use models to graph - _^3

4

on a number line.

Draw a number line with arrows on each end. Place a

fraction strip divided in fourths above the number line.

Mark a 0 on the right side and a -1 on the left side.

Starting from the right, shade three fourths. Label the

number line with -

_^1

4

, - _^2

4

, and - _^3

4

.

Draw a dot on the number line above the -

_^3

4

mark.

1

4

2

4

3

• 
  

  4

  
  


• 
  

  (^1) -- 0
  and Apply
  Graph each fraction on a number line. Use a fraction strip.

  
  

1. 
   
   
   
   • ^3
     8
     2. - ^1
     3
     3. - 1 ^2
     5
     4. - 2 ^5
     6
   
   
   
   

Graph each pair of numbers on a number line. Then write which

number is less.

5. 
   
   
   
   • ^7
     8
     , - ^3
     8
     6. - ^5
     8
     , - 1 ^1
     8
     7. - ^13
     8
     , - ^3
     8
     8. - 1 ^7
     8
     , - 1 ^5
     8
   
   
   
   


6. E WRITE MATH How does graphing - ^3
   4
   differ from graphing ^3
   4
   ?

numb

Main Idea

Graph rational

numbers on the

number line.

• 
  

  1 0

  
  


• 
  

  1

  
  


• 
  

  (^1) -- -
  0
  (^10)
  4
  2
  4
  3
  4
  127_138_C3L1_895130.indd 127 12/31/09 12:34 PM