Multiplication & Division Expressions

Multiplication & Division Expressions

Using tables to write algebraic expressions

Parts of an Algebraic Expression

-Number(s)

-Operation(s) ex: +. - x /

-Variable(s) ex: s, m, p

Let's Try One Together

• What is the rule?

• What is the missing amount?

Multiple Choice

First, what is the operation being used? (Are the numbers getting bigger or smaller?)

• Bigger (Multiplication)

• Smaller (Division)

Fill in the Blank

What is the rule? (How do you turn the top number into the bottom number?)

Fill in the Blank

Now, we add a variable to make it an algebraic expression. (Which variable does the table say to use? Where does it go?)

m x 9

-The numbers get bigger (multiplication)

-We multiply by 9, so the Rule is x9

-We add the given variable, m

Let's try another one....

First, what is the operation? (Are the numbers getting bigger or smaller?)

Multiple Choice

What is the operation?

• Multiplication

• Division

Fill in the Blank

What is the rule of the table? (How do we change the top number to the bottom number?)

Fill in the Blank

Now, add a variable to complete the expression. (Check the table to find the variable).

k / 7

-The numbers get smaller (division)

-The top turns into the bottom by dividing by 7, so the Rule is /7.

-We add the variable k to make it an expression.

Write an expression for the table.

(Write it down for the next slide).

Fill in the Blank

What is the algebraic expression for this table?

Poll

How are you feeling about writing multiplication and division tables?

• Great!

• So-So

• Confused