Solving True-False Equations!

Lesson Plan - Get It!

Audio:

• Have you ever seen a math equation?

Look at the addition equation below.

3 + 4 = 7 + 0

This equation has two different addition sentences on each side of the equal sign.

Your job is to find out if the answers to each number sentence are true and equal to each other.

Time to put on your detective hat again!

First, solve one side of the equation: 3 + 4

• What does 3 + 4 equal?

3 + 4 = ?

Use a math strategy you know to find out!

For example, you can count up using a number line.

3 + 4 = 7!

So, that side of the equation is 7, and it is true.

• Now, what about the other side, 7 + 0?

Any number plus 0 is always that number.

So, 7 + 0 = 7!

That is another true number sentence!

• Now, are both sides equal to each other?

They are!

They are both equal to 7 and they are both true, so this addition equation is true!

Awesome work!

Watch this video to learn more about the mystery of true or false equations!

Time to try another example!

• Is this subtraction statement true or false?

Time to investigate!

9 - 5 = 10 - 4

First, solve one side of the equation: 9 - 5.

• What is 9 - 5?

Use a math strategy you know to find out!

For example, you can count back.

9 - 5 = 4

Great!

So, that side of the equation equals 4, and it is true.

• Now, what about the other side, 10 - 4 ?

10 - 4 = 6 !

So, this equation is false!

• Why?

Because each side of the equal sign is not the same.

9 - 5 = 4

10 - 4 = 6

4 does not equal 6, so this subtraction equation is false!

Great work, math detective!

Time to solve more math mysteries in the Got It? section!