How do parentheses help us write algebraic expressions so we are clear on what they mean?

1. How do parentheses help us write algebraic expressions so we are clear on what they mean? For example, how do we write the algebraic expression “three less than a number, times twenty”?

2. In this lesson you will learn how to write and read algebraic expressions by using parentheses.

3. An algebraic expression contains at least one variable and at least one operation. I’m an algebraic expression! 25 - 3x - 2

4. There are alternative notations to show multiplication without using the sign “x.” 2 • x 2(x) 2x Division can be shown in two ways. 4 x 4 ÷ x

5. Forgetting to use parentheses correctly to create an expression within an expression.

6. ( ) three less than a number, times twenty ( ) x - 3

7. (x -3) times twenty 20(x – 3) factor factor

8. In this lesson you have learned how to write and read algebraic expressions by using parentheses.

9. Write the algebraic expression for: eight times a number, plus five

10. Write an algebraic expression for: • the product of 12 and x, divided by the • sum of 4 and x

11. Write the word form for: 5(25 – w) + 3 w

12. Write the following algebraic expression: • The quantity of 10 less than y, times the • product of 3 and y

13. Write the algebraic expression for: eight times the quantity of a number plus six. Write the word form for: 15(9 _p) - 32