Using Parentheses to Write and Read Algebraic Expressions

This video tutorial teaches how to write and read algebraic expressions using parentheses. It covers the basics of algebraic expressions, including variables and operations, and explains different notations for multiplication and division. The importance of using parentheses correctly is emphasized to avoid common mistakes. The tutorial also demonstrates how to write complex expressions, such as 'three less than a number, times twenty,' by breaking them down into simpler parts and using algebraic notation.

Which of the following is NOT a correct way to represent multiplication in algebraic expressions?

• 2 * x

• 2 dot x

• 2 (x)

• 2 + x

What is a common mistake when using parentheses in algebraic expressions?

• Forgetting to use parentheses correctly

• Using parentheses for addition

• Using too many parentheses

• Using parentheses for subtraction

How would you write 'three less than a number' in algebraic notation?

• 3 - x

• x - 3

• 3 + x

• x + 3

In the expression '20 times the quantity of x minus 3', where is the number 20 typically placed?

• It doesn't matter where it is placed

• At the beginning of the expression

• In the middle of the expression

• At the end of the expression

What is the final algebraic expression for 'three less than a number, times twenty'?

• x - 3 * 20

• 20x - 3

• (x - 3)20

• 20(x - 3)