WarmUp Match each word to the correct definition
- Slides: 13
Warm-Up Match each word to the correct definition. 1. Algebraic Expression 2. Coefficient 3. Constant 4. Term 5. Variable A. Each part of an expression separated by an operation. B. A number that stands by itself C. A number that does not stand by itself (it is attached to a variable) D. A letter that stands for a particular numerical value E. A number sentence without an equal sign, has at least two terms and one operation
1 -1 Variables and Expressions You would be wise to listen carefully and take notes! Goal: to write algebraic expressions Algebra 1 Honors Ms. Register
mathematical quantity - anything that can be measured or counted. numerical expression – expression that represents a particular number Example: 3 + 2 algebraic expression - consists of one or more constants and variables along with one or more arithmetic operations. Example of an algebraic expression: 3 x + 2 constants - numbers variables - letters operations - addition, subtraction, multiplication and division
Multiplication – use a dot or parentheses Here are some ways to represent the product of x and y. Use good form in an answer! factors - the quantities being multiplied Product – the result
Writing Algebraic Expressions In English there is a difference between a phrase and a sentence. In math, Phrases expressions. Sentences equations or inequalities. Phrase The sum of 6 and a number 6 + n Sentence The difference of a number and three is five. n – 3 = 5 Sentence Seven times a number is less than 50. 7 n < 50 When choosing a variable for an unknown, it may be helpful to select a letter that relates to the unknown value (for Sentences must example: let a represent age). If a variable is given use it! Sentences must have a verb!
The product of five and a number 5 n The product of a number and five Would you say 5 notebooks or notebooks 5? 5 n Write your answer in good form - the number comes before a variable in a term involving multiplication.
Write an algebraic expression for each word phrase. a. The difference of a number and 7 n– 7 b. 32 increased by a number 32 + n c. 25 less than a nnumber – d. 10 less the product of 5 and a number 10 – 5 n e. The quotient of a number and six. n Use a fraction 6 bar to designate division!
Example 1 Write the phrase as an algebraic expression. a. 11 greater than a number n + 11 b. a number subtracted from 15 Did you use a fraction bar to designate division? 15 – n c. The sum of a number and 30 n + 30 d. Maria’s age minus 27 a – 27 18 e. The quotient of 18 and a number n f. The sum of a number and ten, divided by two.
Which of the following expressions represents 7 times a number decreased by 13? 1. 2. 3. 4. 7 x + 13 7 x - 13 13 - 7 x 13 + 7 x Answer Now
Which one of the following expressions represents 28 less than three times a number? 1. 2. 3. 4. 28 - 3 x 3 x - 28 28 + 3 x 3 x + 28 Answer Now
Write a verbal expression for: 1) 8 + a. The sum of 8 and a 2) The ratio of m to r Do you have a different way of writing these?
Which of the following verbal expressions represents 2 x + 9? 1. twice a number increased by 9 2. a number increased by nine 3. twice a number decreased by 9 4. 9 less than twice a number Answer Now
Which of the following expressions represents the sum of 16 and five times a number? 1. 2. 3. 4. 5 x - 16 16 x + 5 16 + 5 x 16 - 5 x Answer Now
Introduction match each term with its correct definition
Match each vocabulary word to the correct meaning
Match each vocabulary word to the correct meaning.
Match the words with the correct definition
Match the words with their correct meaning
Match each food chain word to its definition
Match each graph with the correct description.
Match each sentence to the correct sentence type
Match each sentence to the suitable picture
In your notebook write the question
Match the terms to their correct definitions
Underline the correct word or phrase in each sentence
Fill in the blanks with correct form of adjectives
Fill in the correct form of the word
