# Algebraic Expressions

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Category: Education

## Presentation Description

Algebraic Expression - An Introduction

## Presentation Transcript

### Algebraic Expressions :

Algebraic Expressions

### Definition :

Definition Variable – A variable is a letter or symbol that represents a number (unknown quantity). 8 + n = 12

### Definition :

Definition A variable can use any letter of the alphabets. n + 5 x – 7 w - 25

### Definition :

Definition Algebraic expression – a group of numbers, symbols, and variables that express an operation or a series of operations. m + 8 r – 3

### Example :

Example Evaluate an algebraic expression – To find the value of an algebraic expression by substituting numbers for variables. m + 8 m = 2 2 + 8 = 10 r – 3 r = 5 5 – 3 = 2

### Example :

Example Simplify – Combine like terms and complete all operations m = 2 m + 8 + m 2 m + 8 (2 x 2) + 8 4 + 8 = 12

### Words That Lead to Subtraction :

Words That Lead to Subtraction Decreased Less Difference Minus How many more

### Write Algebraic Expressionsfor These Word Phrases :

Write Algebraic Expressionsfor These Word Phrases Ten more than a number A number decrease by 5 6 less than a number A number increased by 8 The sum of a number & 9 4 more than a number n + 10 w - 5 x - 6 n + 8 n + 9 y + 4

### Write Algebraic Expressionsfor These Word Phrases :

Write Algebraic Expressionsfor These Word Phrases A number s plus 2 A number decrease by 1 31 less than a number A number b increased by 7 The sum of a number & 6 9 more than a number s + 2 k - 1 x - 31 b + 7 n + 6 z + 9

### Evaluate each algebraic expression when x = 10 :

Evaluate each algebraic expression when x = 10 x + 8 x + 49 x + x x - x x - 7 42 - x 18 59 20 0 3 32

### Complete This Table :

Complete This Table 2 7 18 29

### Write an Algebraic Expression for These Situations :

Write an Algebraic Expression for These Situations Scott’s brother is 2 years younger than Scott The sum of two numbers is 12 The difference between two numbers is 5 s - 2 a + b = 12 m – n = 5

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