The Number Line
7. Adding and Subtracting Integers

a. SCALE: Set the scale of the number line that is:
• Type in a number >=1 and <=500.
• Then click on the Set Scale button.  

   

• What do you want to do? Click on the button!

   

• Now click on Ready for First Number.

   

b. FIRST NUMBER: Click and drag the point on the red slider to the value of the first number.

• Now click on Ready for Second Number.

   

c. Second Number: Click and drag the point on the blue slider to the value of the second number.

d. OPERATION: What is the result?

• Click on "Show Result " to see it on the number line.

   

e. EQUATION: Write down the equation for the operation and then do the operation.

• Click on Show Equation to check your answer.

   

Click on Reset to start over.

   
                                           

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      LFS with idea for number line by Megan Yanes, idea for pseudo-slider by Zen Biker Maniac and help with "If" statement by Guy Barmoha

      Created with GeoGebra