Changes for 2006-2007 Insert more standardized test practices. Insert more comparison problems Send students to board more.

Translating Words into Mathematical Symbols 1.5 Goal Translate words into Mathematical Symbols. Key Words translate phrase sentence

TRANSLATING WORDS INTO MATHEMATICAL SYMBOLS 1.5 TRANSLATING WORDS INTO MATHEMATICAL SYMBOLS To solve real-life problems, you often need to translate words into mathematical symbols. Translating Words Look for words like sum or difference that indicate mathematical operations.

Write the phrase as a variable expression. Let x represent the number. 1.5 Translating Words into Mathematical Symbols EXAMPLE 1 Translate Addition Phrases Write the phrase as a variable expression. Let x represent the number. Phrase Translation The sum of 6 and a number 8 more than a number A number plus 5 A number increased by 7

Write the phrase as a variable expression. Let y represent the number. 1.5 Translating Words into Mathematical Symbols EXAMPLE 2 Translate Subtraction Phrases Write the phrase as a variable expression. Let y represent the number. Phrase Translation The difference between 5 and a number 7 minus a number A number decreased by 9 4 less than a number

11 more than a number A number decreased by 10 1.5 Translating Words into Mathematical Symbols Checkpoint Write the phrase as a variable expression. Let x represent the number. 11 more than a number A number decreased by 10

1.5 Translating Words into Mathematical Symbols IMPORTANT NOTE: For addition and multiplication, the order is not important. “The sum of 6 and a number” can be written as 6+x or x+6. For subtraction and division, the order IS IMPORTANT. “The quotient of a number and 4” means , not .

Write the phrase as a variable expression. Let n represent the number. 1.5 Translating Words into Mathematical Symbols Translate Multiplication and Division Phrases EXAMPLE 3 Write the phrase as a variable expression. Let n represent the number. The product of 9 and a number 10 times a number A number multiplied by 3

Write the phrase as a variable expression. Let n represent the number. 1.5 Translating Words into Mathematical Symbols Translate Multiplication and Division Phrases EXAMPLE 3 Write the phrase as a variable expression. Let n represent the number. One fourth of a number The quotient of a number and 6 7 divided by a number

Write each sentence as an equation or an inequality. 1.5 Translating Words into Mathematical Symbols EXAMPLE 4 Translate Sentences Write each sentence as an equation or an inequality. Sentence Translation The sum of a number x and 12 is 16. The quotient of 15 and a number is x less than 3.

Write each sentence as an equation or an inequality. 1.5 Translating Words into Mathematical Symbols EXAMPLE 4 Translate Sentences Write each sentence as an equation or an inequality. Sentence Translation The product of 5 and a number x is 25. 10 times a number is greater than or equal to 50

1.5 Translating Words into Mathematical Symbols Translate and Solve a Real-Life Problem EXAMPLE 5 You make a long distance telephone call. The rate is $.20 for each minute. The total cost of the call is $6.00. How long was the call?

Homework pg. 33-35 10-18, 20-23, 24-38 even, 43-46

Trivia What animal can imitate any sound from a squeaking door to a cat meowing? What is the only animal sound that does not echo? What animal can survive longer without water than a camel? What is the only animal that can never get sick? What is the only cat that cannot retract its claws? What is the name of the dog from "The Grinch Who Stole Christmas" What is the only bird that can sleep while flying? What fish has 100,000 taste buds

Answers mockingbird a duck’s quack rat shark cheetah max albatross catfish