You use a $20 bill to buy lunch at a cafe. You order a sandwich from the menu board on page 118.

• Copy and complete the table using information from your book on p. 118:

• In the last column write a numerical expression for the amount of change received.

Compare the expression you wrote in part (b) with the expressions in the last column of the table in part (a).

• Part (a) are numerical expressions

• Part (b) are algebraic expressions

The expression 20-4.65s represents the amount of change one customer receives after ordering from the menu board on page 118.

• Explain what each part of the expression represents:

• 20

• 4.65

• s

• Do you know what the customer ordered? Explain your reasoning.

Copy and complete the table here:

Go into the participants tab and give me a coffee mug symbol when you are done.

Then go on to parts b and c.