Copyright © Swun Math Grade 6 Unit 4 Lesson 15 P SJ
MPs
Applied MP
* Embedded MP
Evaluate Expressions
Generated from Word Problems
Procedural Lesson
Grade 6 · Unit 4 · Lesson 15
MC: 6.EE.2c
1 2 3 4 5 6 7 8
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Steps:
1. Read the problem.
2. Use an expression to represent the
situation.
3. Replace the variable with the number
given.
4. Evaluate following order of operations.

Problem of the Day
Objective:
Vocabulary Notes
Variable: a letter or symbol that represents
an unknown value
n
+ 3
Expression: numbers, symbols and
operations grouped together with no equal
sign to represent a value
Copyright © Swun Math Grade 6 Unit 4 Lesson 15 P SJ
Structured Guided Practice
(A / B Partners Practice)
Directions: Evaluate the expression.
1. The expression
l • w • h
can be used to find the volume of a rectangular
prism where
l
represents length,
w
represents width, and
h
represents
height. Use the expression to find the volume of an object that has a
length of 24 cm, a width of 5 cm and a height of 2 cm.
2. The expression
s
+ 0.08
s
can be used to find the total cost of an item with
8% sales tax. Use the expression to find the total cost of a shirt that costs
$15.
MP1: What information given in the problem helps you decide what to include in your
algebraic expression?
MP3: What were you considering when evaluating the expression?
Copyright © Swun Math Grade 6 Unit 4 Lesson 15 P SJ
Final Check for Understanding
(Teacher Checks Work)
Directions: Evaluate the expression.
1. The expression
1
/
2
b • h
can be used to find the area of a triangle where
b
represents the base and
h
represents the height. Use the expression to
find the area of a triangle with a base of 35 in. and a height of 40 in.
2. The expression
p
+ 0.09
p
can be used to find the total cost of an item with
9% sales tax. Use the expression to find the total cost of a pair of pants
that costs $30.
Copyright © Swun Math Grade 6 Unit 4 Lesson 15 P SJ
Name: ____________________________
Date: ______________________________
1. The expression
r • t
can be used to find the distance where
r
represents rate and
t
represents time. Use the expression to find the
distance traveled by someone who drove at a rate of 55 miles/hour for 6
hours.
2. The expression
d
+ 0.09
d
can be used to find the total cost of an item
with 9% sales tax. Use the expression to find the total cost of a dress that
costs $55.
3. The expression 2
l
+ 2
w
can be used to find the perimeter of a rectangle
where
l
represents length and
w
represents width. Use the expression to
find the perimeter of a rectangular garden that has a length of 14 ft. and a
width of 8 ft.
Student Practice
Unit 4 Lesson 15: Evaluate Expressions
Generated from Word Problems
Directions: Evaluate the expression.
Copyright © Swun Math Grade 6 Unit 4 Lesson 15 P SJ
4. The expression
1
/
2
b • h
can be used to find the area of a triangle where
b
represents the base and
h
represents the height. Use the expression to
find the area of a triangle with a base of 12 cm and a height of 14 cm.
5. The expression
l • w • h
can be used to find the volume of a rectangular
prism where
l
represents length,
w
represents width, and
h
represents
height. Use the expression to find the volume of an object that has a
length of 15 inches, a width of 5 inches and a height of 3 inches.
6. The expression 4
s
can be used to find the perimeter of a square where
s
represents side length. Use the expression to find the perimeter of a
square vegetable garden with side lengths of 8 yards.
Student Practice
Unit 4 Lesson 15: Evaluate Expressions
Generated from Word Problems
Copyright © Swun Math Grade 6 Unit 4 Lesson 15 P SJ
1. Terry had 12 books. She bought some more books at the bookstore. Write
and solve an expression to find the total number of books Terry has if
she bought 7 books.
2. Mr. Mari bought his son a $10 music book, and paid a piano tutor $20 per
hour to teach his son. Choose the expression that shows how much Mr.
Mari spent if his son had three hours of piano tutoring last week.
a. $20 + $10
p
b. $20
p
+ $10
c. $20
p
– $10
d. $20 – $10
p
Extension Activity
*
MP4: Apply mathematics in everyday life.
With a partner, create a word problem that contains variables and an
expression. Find another pair of partners and solve each other’s problem.
Challenge Problems
Directions: Read and solve each problem.
Copyright © Swun Math Grade 6 Unit 4 Lesson 15 P SJ
Closure
Closure
Recap today’s lesson with one or more of the following questions:
MP1: What information given in the problem helps you decide what
to include in your algebraic expression?
MP3: What were you considering when evaluating the expression?
Reaching Consensus
*MP3: Do you agree/disagree with what said?
Student Presentations
*MP6: How do you know your answers are correct/reasonable?
Copyright © Swun Math Grade 6 Unit 4 Lesson 15 P SJ
Notes