Say “Ahh-gebra”

Original Work by Nancy Hall

Modified by: Gail Warren and Andy Derer

With

Your Name

Divide your sticks into 3 equal groups

Marking Your Sticks

• FIRST group mark THREE RED dots.

• SECOND group mark FOUR BLUE dots.

• THIRD group mark FIVE GREEN dots.

Questions, Questions, Questions

• What is the largest number you can make with the green sticks?

• What is the largest number you can make with the blue sticks?

• What is the largest number you can make with the red sticks?

Questions

• 3• 5• 7• 9

• 4• 6• 8• 10

Use your sticks to make the following:

What is the largest possible number

using all the sticks?

How much will 3 red sticks equal?

Can we write a math sentence telling how much 3

red sticks equal?

3 red sticks is 9

How much will three green sticks equal?

Can we write a math sentence telling us how much 3 green

sticks equals?

3 green sticks is 15

What letter could we substitute for red?

r

We will use b to mean blue.

b

We will use g to mean green.

g

There’s a Shortcut!

3 green sticks can be written as 3 x g

And we can get SHORTER!

3 x g can be written as 3g

3 green sticks is 15A shorter way is

3 x g = 15Even shorter is

3g = 15

3bSo what is

equal to?

2bSo what is

equal to?

1bSo what is

equal to?

4bSo what is

equal to?

A math sentence that contains an equal sign is

called an

EQUATION

A letter that represents a number is called a

Variable

What is the variable that stands for 4?

b

What is the variable that stands for 3?

r

What is the variable that stands for 5?

g

Can you figure out this problem using a variable?

is ______.15

And the equation is…

3g = 15

It’s time to practice…

Let’s Wrap Up

Say “Ahh-gebra”

• What is a math sentence that contains an equals sign called?

• What is a letter that stands for a number called?

Equation

Variable

Thank you!

Good-Bye