Download - Pre-Algebra Lesson 1.3
1-3 Variables and Expressions
Objective: Evaluate expressions containing variables and translate
verbal phrases into algebraic expressions.
Find the value of each expression.
1. 54 – 42 72. 36 9 * 33. (40 * 2) - (6 * 11)
4. 37 + 38 3 30 - 5
Find the value of each expression.
1. 54 – 42 72. 36 9 * 33. (40 * 2) - (6 * 11)
4. 37 + 38 30 - 55. 3[(18 - 3) + 4(5 + 7)]
Find the value of each expression.
1. 54 – 42 72. 36 9 * 33. (40 * 2) - (6 * 11)
4. 37 + 38 30 - 55. 3[(18 - 3) + 4(5 + 7)] 189
Find the value of each expression.
1. 54 – 42 72. 36 9 * 33. (40 * 2) - (6 * 11)
4. 37 + 38 30 - 55. 3[(18 - 3) + 4(5 + 7)]6. Write an expression that would help you find the total cost of twenty adult zoo tickets at $6 each and ten children's tickets at $2 each, Then find the total cost.
Find the value of each expression.
1. 54 – 42 72. 36 9 * 33. (40 * 2) - (6 * 11)
4. 37 + 38 30 - 55. 3[(18 - 3) + 4(5 + 7)]6. Write an expression that would help you find the total cost of twenty adult zoo tickets at $6 each and ten children's tickets at $2 each, Then find the total cost.
20(6) + 10(2)
Find the value of each expression.
1. 54 – 42 72. 36 9 * 33. (40 * 2) - (6 * 11)
4. 37 + 38 30 - 55. 3[(18 - 3) + 4(5 + 7)]6. Write an expression that would help you find the total cost of twenty adult zoo tickets at $6 each and ten children's tickets at $2 each, Then find the total cost.
20(6) + 10(2); $140
+ - x plus
sum
more than
increased by
total
in all
minus
difference
less than
subtract
decreased by
times
product
multiplied
each
of
divided
quotient
Examples
Translate each phrase into an algebraic expression.a. a number decreased by eight
Let n represent the number.
Examples
Translate each phrase into an algebraic expression.a. a number decreased by eight
Let n represent the number.The words ‘decreased by’ suggests subtraction.
Examples
Translate each phrase into an algebraic expression.a. a number decreased by eight
Let n represent the number.The words ‘decreased by’ suggests subtraction.The algebraic expression is n – 8.
Examples
Translate each phrase into an algebraic expression.a. a number decreased by eight
Let n represent the number.The words ‘decreased by’ suggests subtraction.The algebraic expression is n – 8.
b. seven more than twice as many dollars.
Examples
Translate each phrase into an algebraic expression.a. a number decreased by eight
Let n represent the number.The words ‘decreased by’ suggests subtraction.The algebraic expression is n – 8.
b. seven more than twice as many dollars.Let d represent dollars.
Examples
Translate each phrase into an algebraic expression.a. a number decreased by eight
Let n represent the number.The words ‘decreased by’ suggests subtraction.The algebraic expression is n – 8.
b. seven more than twice as many dollars.Let d represent dollars.The words ‘more than’ suggest addition and the word twiceis another way of saying ‘two times’.
Examples
Translate each phrase into an algebraic expression.a. a number decreased by eight
Let n represent the number.The words ‘decreased by’ suggests subtraction.The algebraic expression is n – 8.
b. seven more than twice as many dollars.Let d represent dollars.The words ‘more than’ suggest addition and the word twiceis another way of saying ‘two times’.The algebraic expression is 7 + 2d or 2d + 7
Integration
Draw a picture representing a rectangle whose length is eight less than four times its width. Write an expression for the perimeter of the rectangle.