standard_description: Use variables to represent numbers and write expressions when solving a real-world or mathematical problem; understand that a variable can represent an unknown number, or, depending on the purpose at hand, any number in a specified set.
problem_activity: Problem 1
a.   What do you notice? What do you wonder?
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b.   Determine the value of the point on each number line in Part (a) above.
Problem 2
a.   Label each point with the value it represents.
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b.   Locate and label each number on the number line. Label the intervals with the numbers they represent if it helps.
60
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897
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364
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Problem 3
a.   Plot 55 on a number line from 50 to 60.
b.   Plot 55 on a number line from 0 to 100.
c.   Plot 55 on a number line from 0 to 1,000.


aligns: no