1. 4th Grade Math
Algebra
Solve for an unknown number represented by a
letter
Jessica Corriere & Robert Richards

2. This PowerPoint is a
sample of the book, 4th
Grade Math
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3. Use letters, boxes, or other symbols to stand
for any number in simple expressions or
equations (e.g., demonstrate an
understanding and the use of the concept of
a variable).

4. Which number is symbolized by n?
6 x n = 48
A. 6
B. 7
C. 8
D. 9

5. How to solve
Understand how to solve for the unknown.
6 x n = 48
Both sides must be treated the same
Divide both sides by 6 to get the n alone on one side
(6 x n) ÷ 6 = 48 ÷6
n = 48 ÷6
n = 8
Choice C has the correct answer
***
You understand it when you can explain it

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