Translating Words into Algebraic Expressions

Vocabulary  Variable  is a symbol usually a letter that represents one or more numbers.  ex. A number - n  Algebraic Expression  is a mathematical phrase that can include numbers, variables, and operation symbols.  ex. 2n - 1  Equation  is a mathematical sentence that uses an equal sign.  ex. 4x + 5 = 25

Words for Addition  Addition  More than,  plus,  sum,  total,  in addition to,  added to,  increased by  In all

Words for Subtraction  Subtraction  difference,  minus,  less than,  more than,  taken away,  subtracted

Words for Multiplication  Multiplication  multiplied by,  product,  twice,  Times  Of  each

Words for Division  Division  divided by,  quotient,  Split  Per

State which Operation each word describes. 1.In all 2.Difference 3.Per 4.Of 5.Total 6.Twice 7.Less than 8.Split 9.Sum 10.Product

How to Translate a sentence into an expression The difference of n and 7 Step 1 - Underline the numbers and variables Step 2 - Box the operations Step 3 - Rewrite n - 7

Example 2 Seven more than n Step 1 - Underline the numbers and variables Step 2 - Box the operations Step 3 - Rewrite n + 7 REMEMBER - more than & less than come after!

With more than one operation  Two times a number plus 5 2 n5+ Or 2n +5

 Answers for BINGO cards: Puts these answers anywhere on your BINGO Card   2y 2 6y3 + yFREE- y – 32y – 4y y + 5 3yy + 2-6y3y + 2  y – 3y – 52y + 22y + 3 2yy 2 2y + 4y 3  4y – 36 - y 

Let’s Practice some together!!

Twelve split into three parts

The quantity Seven less than four, all split into three parts

A hiking company charges $12 each hiking trip. How much money will they make if they have h hiking trips.

My car gets 38 miles per gallon. How many miles I can drive if I have g gallons of gas.

Tickets for a school carnival are sold in two types of booklets. The six-ticket booklet costs $3.00 and the twelve-ticket booklet costs $5.50.

Emily had m dollars saved from her allowance. At the end of the month, the amount of Emily’s savings had tripled. She then bought a pair of jeans for s dollars.

Equations  Key Words [ is and equals] Six more than four times a number is thirty eight n = 38 or 6 + 4n = 38

Let’s Practice Some More Together!!

Two added to an unknown number is the same as four.

Three taken away from an unknown number is six.

A hot air balloon was floating at a certain height, x, above the ground. Then the balloon rose 25 feet to a height of 6,000 feet above the ground.

Julie and Tameka collected cans of food for a food drive at their school. Julie collected 38 cans which was more than three times the cans that Tameka collected. How many cans did Tameka collect?

Turn whiteboard around and practice some more!!!

Gallery Walk Time!

Quick Polls

Keith has $500 in a savings account at the beginning of the summer. He wants to have $200 in the account by the end of the summer. He will withdraw $25 each week for food, clothes, and movie tickets.

Clark scored 19 points. Clark scored 12 points more than Josh.

Adriana counted 8 fewer birds on Tuesday than on Thursday. She counted at most 32 birds on Thursday. How many birds were there on Tuesday?

Rico has $5. Bagels cost $0.65 each, and a small container of cream cheese costs $1. How many bagels can he buy?