This document provides a lesson on reading expressions that use letters to represent numbers. It includes an opening exercise where students identify mathematical operations from words. Students then practice using vocabulary words to describe given expressions and writing expressions using words. The lesson aims to help students read and understand expressions with variables through mathematical vocabulary.

1. Lesson 15: Read Expressions in Which Letters Stand for Numbers
Date: 3/31/14 S.61
61
©2013CommonCore,Inc. Some rights reserved.commoncore.org
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
NYS COMMON CORE MATHEMATICS CURRICULUM 6•4Lesson 15
Lesson 15:Read Expressions in Which Letters Stand for Numbers
Classwork
Opening Exercise
Complete the graphic organizer with mathematical words that indicate each operation. Some words may not indicate
only one operation.
Example 1
Write an expression using words.
a.
b.
ADDITION SUBTRACTION MULTIPLICATION DIVISION EXPONENTS

2. Lesson 15: Read Expressions in Which Letters Stand for Numbers
Date: 3/31/14 S.62
62
©2013CommonCore,Inc. Some rights reserved.commoncore.org
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
NYS COMMON CORE MATHEMATICS CURRICULUM 6•4Lesson 15
c.
d.
e.
f.
Exercises
Circle all the vocabulary words that could be used to describe the given expression.
1.
2.
3.
4.
ADDITION SUBTRACTION MULTIPLICATION DIVISION
SUM DIFFERENCE PRODUCT QUOTIENT
ADD SUBTRACT MULTIPLY DIVIDE
MORE THAN LESS THAN TIMES EACH

3. Lesson 15: Read Expressions in Which Letters Stand for Numbers
Date: 3/31/14 S.63
63
©2013CommonCore,Inc. Some rights reserved.commoncore.org
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
NYS COMMON CORE MATHEMATICS CURRICULUM 6•4Lesson 15
Write an expression using vocabulary to represent each given expression.
5.
6.
7.
8.
9.
10.

4. Lesson 15: Read Expressions in Which Letters Stand for Numbers
Date: 3/31/14 S.64
64
©2013CommonCore,Inc. Some rights reserved.commoncore.org
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
NYS COMMON CORE MATHEMATICS CURRICULUM 6•4Lesson 15
Problem Set
1. List five different vocabulary words that could be used to describe each given expression.
a.
b.
c.
2. Write an expression using math vocabulary for each expression below.
a.
b.
c.
d.