MULTIPLICATION AND EQUALITY
LEARNING GOAL #1:
We are learning to master our multiplication facts to 9X9.
OBJECTIVES:
You will be tested on:
1) Quick recall of multiplication facts to 9X9.
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LEARNING GOAL #2:
We are learning to understand that the equal sign means "same amount on both sides" and how to solve for an unknown number.
OBJECTIVES:
You will be tested on:
1) Solving a one-step addition or subtraction equation that has one unknown number.
MULTIPLICATION FACTS
Helpful Videos
Multiplication Tips
Solving Equations
Helpful Links
BALANCING AN EQUATION
KEY POINT:
The equals sign ("=") means that both sides are the same.
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To solve an equation with an unknown number, we have to figure out what number will balance both sides.
LEVEL 1 EXAMPLE:
x + 8 = 15
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We know one side is 15. How do we make 15 on the other side?
We can solve this using mental math. What + 8 is 15?
7 + 8 = 15
x = 7
Or, we can solve this by getting x by itself. To do this we take away the 8. But what we do on one side, we have to do on the other:
x + 8 = 15
-8 -8
x = 7
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LEVEL 2 EXAMPLE:
x + 7 = 20 - 10
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Start by solving the side that is complete:
x + 7 = 20 - 10
x + 7 = 10
Then complete by balancing the equation using one of the methods above.
3 + 7 = 20 - 10
x = 3