6.4. Lesson 7- Replacing Letters with Numbers

6.4. Lesson 7- Replacing Letters with Numbers

So what is the square's area?

9 square units

Fill in the Blanks

Fill in the Blanks

A letter is ONE NUMBER

A letter represents one number in an expression. That number was 3 in our first square and 23 in our second square.

When that number replaces the letter, the expression can be evaluated to one number.

Understand that a letter represents ONE NUMBER. 9 is an example of one number, but also is 529. (even though 529 has 3 digits, it is still ONE number)

ANSWERS...

Make sure students have the units correctly recorded in each of the cells of the table. When units are not specified, keep the label unit or square unit.

turn to ex. 2 in your books to answer the following questions

Open Ended

How did you find out that x=8?

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Turn here in your books you will need to reference for the next questions

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What does L, W and H represent in the first diagram?

Fill in the Blanks

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What other number can we substitute for the 𝒍?

Fill in the Blanks

Open Ended