1. DO Now! Agenda 09.26.2018 Format your papers for Cornell Notes Do Now
Topic: Rewriting Algebraic Expressions
E.Q.: How can I Translate Algebraic Expressions
Do Now
D.E.A.R. ( When finished with Do nows)
Cornell Notes on Translating Algebraic Expressions

2. Writing Algebraic Expressions
Objective:
Be able to write an algebraic expression for a word phrase or write a word phrase for an expression.

3. Although they are closely related, a Great Dane weighs about 40 times as much as a Chihuahua.
An expression for the weight of the Great Dane could be 40c, where c is the weight of the Chihuahua.
When solving real-world problems, you will need to translate words, or verbal expressions, into algebraic expressions.

4. Notes
In order to translate a word phrase into an algebraic expression, we must first know some key word phrases for the basic operations.

5. Addition Phrases: More than Increase by Greater than Add Total Plus
Sum

6. Subtraction Phrases: Decreased by Difference between Take Away Less
Less than*
Subtract from*

7. Multiplication Phrases:
Product
Times
Multiply Of
Twice or double
Triple

8. Division Phrases:
Quotient
Divide
Divided by
Split equally

9. Notes
Multiplication expressions should be written in side-by-side form, with the number always in front of the variable.
3a t c f

10. Notes
Division expressions should be written using the fraction bar instead of the traditional division sign.

11. Examples Addition phrases: 3 more than x the sum of 10 and a number c
a number n increased by 4.5

12. Examples Subtraction phrases: a number t decreased by 4
the difference between 10 and a number y
6 less than a number z

13. Examples Multiplication phrases: the product of 3 and a number t
twice the number x
4.2 times a number e

14. Examples Division phrases: the number y divided by 2 2.5 divide g
the quotient of 25 and a number b
the number y divided by 2
2.5 divide g

15. Rewrite these verbal expressions as algebraic expressions.
1. the sum of s and 12
s+12
2. the product of 15 and some number
15n
3. n to the seventh power n7
4. 56 increased by twice a number
56+2a
5. Four less than a number
n-4

16. Guided Practice

17. Reference
teachers.henrico.k12.va.us/math/.../7-13/7-13_WritingAlgebraicExpressions.ppt