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10.1.notebook
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January 10, 2017
Jan 208:39 AM
Module 10
Lesson 1: Modeling and writing Expressions
Lesson 2: Evaluating Expressions
Lesson 3: Generating Equivalent Expressions
Jan 208:39 AM
Module 10 lesson 1: Modeling and Writing Expressions
Objective: Write expressions that record operations with numbers and with letters, standing for numbers
Jan 208:44 AM
Algebraic Expression:
an expression that contains one or more variable and may also contain operation symbols
** NO equal sign **
Variable:
is a letter or symbol used to represent an unknown or unspecified number. The value of a variable may change.
Constant:
A specific number whose value does not change
g + 5
Jan 209:40 AM
In multiplication and division expressions
Usually written without the symbol X or
3 x n 3 n3n3 nn 3
3 n
Jan 209:47 AM
Operations Addition Subtractions Multiplication Division
Words
Jan 209:47 AM
Operations Addition Subtractions Multiplication Division
Words
added to
plus
sum
more than
subtracted from
minus
difference
less than
times
multiplied by
product
groups of
divided by
divided into
quotient
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January 10, 2017
Jan 209:47 AM
Write each phrase as an algebraic expression
The sum of 7 and x
The quotient of z and 3
Jan 2010:12 AM
Write each phrase for each expression
11x
8 y
1
1/7
Write a phrase for each algebraic expression.
9 + y
Jan 2010:13 AM
Complete page 262 numbers 16 in your workbooks
Jan 1011:49 AM
Complete hand out side 1
Jan 2011:21 AM
Modeling Algebraic Expressions
7 + x
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Jan 2011:29 AM
Modeling Algebraic Expressions
Z
3
Jan 2011:30 AM
Modeling Algebraic Expressions
t 2
Jan 2011:30 AM
Modeling Algebraic Expressions
4y
Jan 2012:00 PM
Comparing Expressions using Models
Equivalent means equal
x + 2 = x + 1 + 1
Jan 201:31 PM
Kelly and Charlotte started the day with the same amount of money. Kelly spent 5 dollars on lunch. Charlotte spent 3 dollars on lunch and 2 dollars on a snack after school. Do Kelly and Charlotte have the same amount of money left?
Write and algebraic expression to represent the money Kelly has left. Represent the expression with a model.
x 5
Write and algebraic expression to represent the money Charlotte has left. Represent the expression with a model.
x 3 2
Jan 201:38 PM
Complete number 9 on page 264
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January 10, 2017
2
2/7
Use a bar model to represent the expression.
5 + y
3
3/7
Amanda and Stuart began the week with the same amount of money. Amanda paid $7 to go to the movies. Stuart spent $4 on snacks and $3 on a pen. Write algebraic expressions and draw bar models to represent the money each has left at the end of the week. Do Amanda and Stuart have the same amount of money left?
4
4/7
Tickets to the aquarium cost $27 per person. Write an expression to represent the total cost of tickets for a group of people.
A
Kelly has some savings. After mowing two lawns on Saturday, she adds $40 to her savings. How much money has Kelly saved?
B
5
5/7
Lesson Quiz
Write each phrase as an algebraic expression: z times 5 6 plus n
1.
2.
6
6/7
Use a bar model to represent 4 + m.3.
7
7/7
Lesson Quiz
Jan and Jackie check out the same number of library books. Jan turns in 4 books after 3 weeks. Jackie returns 2 books that week and 4 books later. Write algebraic expressions and draw bar models to represent the books Jan and Jackie have left. Do they have the same number of books left? Justify your answer.
4.
Modeling and Writing Expressions
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January 10, 2017
Jan 201:45 PM
Complete page 265 all
a1
the quotient of z and 5
1/7
Modeling and Writing Expressions
Write a phrase for each algebraic expression.
Additional Example 1
9 more than y
9 + y
a2
2/7
Additional Example 2
Modeling and Writing Expressions
Use a bar model to represent the expression.
5 + y
a3
3/7
Additional Example 3
Modeling and Writing Expressions
Amanda and Stuart began the week with the same amount of money. Amanda paid $7 to go to the movies. Stuart spent $4 on snacks and $3 on a pen. Write algebraic expressions and draw bar models to represent the money each has left at the end of the week. Do Amanda and Stuart have the same amount of money left?
The models are equivalent, so Amanda and Stuart have the same amount of money left.
a4
4/7
Modeling and Writing Expressions
Tickets to the aquarium cost $27 per person. Write an expression to represent the total cost of tickets for a group of people.
27x
y + 40
A
B Kelly has some savings. After mowing two lawns on Saturday, she adds $40 to her savings. How much money has Kelly saved?
Additional Example 4
a5
5/7
Lesson Quiz
Write each phrase as an algebraic expression: z times 5 6 plus n
1.
2.
Modeling and Writing Expressions
5z, 6 + n
8 multiplied by y, 6 divided by m
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a6
6/7
Lesson Quiz
Use a bar model to represent 4 + m.3.
Modeling and Writing Expressions
a7
7/7
Lesson Quiz
Jan and Jackie check out the same number of library books. Jan turns in 4 books after 3 weeks. Jackie returns 2 books that week and 4 books later. Write algebraic expressions and draw bar models to represent the books Jan and Jackie have left. Do they have the same number of books left? Justify your answer.
4.
Modeling and Writing Expressions
No. Sample answer: The expressions are not equivalent. If b = the number of books each checked out, Jan's books = b – 4 and Jackie's books = b – 2 – 4.
Jan 201:45 PM