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Evaluating expressions with two variables: fractions & decimals

We've already evaluated expressions with two variables. Now it's time to do it with fractions and decimals.
Khan Academy video wrapper
Evaluating expressions with two variables: fractions & decimalsSee video transcript

Let's study another example.

Evaluate 13a112b when a=12 and b=6.
=13a112b=13121126        Replace a with 12 and b with 6.=413=0

Now, let's practice

Problem 1
Evaluate 32y3+53z when y=4 and z=3.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi

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