Writing Algebraic Expressions

The product of ten and seven. Explore-Mini Lesson Write the following as a numerical expression. The product of ten and seven. or The product of ten and five. or The product of ten and a number. VARIABLE Think…what can we use to represent a number when we don’t know the number?

Explore Write the following as a numerical expression. Numerical Expression: an expression containing one or more numbers and operations i.e. 4+7. or

Variable: a letter or symbol that represents an unknown quantity. Explore- Mini Lesson Variable: a letter or symbol that represents an unknown quantity. Now, for my next trick, I will introduce a new way to write multiplication. Write as a algebraic expression. The product of ten and a number. A number written next to a variable means multiplication.

Vocabulary Explore- Mini Lesson This new expression, 10n, is called an Algebraic Expression. Why do mathematicians call them Algebraic Expressions? Vocabulary Algebraic Expression: an expression containing at least one variable. Numerical Expression: an expression containing one or more numbers and operations.

Vocabulary Explore- Mini Lesson Written Expression: an expression written with words. The sum seventeen and number Three times the difference of nine and seven Variable: any letter in the alphabet or symbol that represents an unknown quantity.

Write an algebraic expression for the problems below. Practice- Whole Class Write an algebraic expression for the problems below. Important!!!! Identify the operation(s) by underlining key words. a) The sum of ten and a number. b) The quotient of a number and twelve. c) Eleven decreased by five times a number.

Assessment- Exit Slip Directions: 1) Write your own algebraic expression using n, 3, 5. You must use at least 2 operations. 2) Translate your algebraic expression into a written expression. 3) 3) Turn and Talk: Read your written expression to your partner. Have your partner write the algebraic expression. Switch roles.