More Related Content Similar to G6 m4-g-lesson 23-s (20) G6 m4-g-lesson 23-s1. Lesson 23: True and False Number Sentences
Date: 4/23/14 S.100
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NYS COMMON CORE MATHEMATICS CURRICULUM 6•4Lesson 23
Lesson 23:True and False Number Sentences
Classwork
Opening Exercise
Determine what each symbol stands for and provide an example.
Symbol What the Symbol Stands For Example
Example 1
For each inequality or equation your teacher displays, write the equation or inequality, then substitute 3 for every .
Determine if the equation or inequality results in a true number sentence or a false number sentence.
1.
2.
3.
4.
5.
6.
2. Lesson 23: True and False Number Sentences
Date: 4/23/14 S.101
101
©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 23
Exercises
Substitute the value into the variable and state (in a complete sentence) whether the resulting number sentence is true
or false. If true, find a value that would result in a false number sentence. If false, find a value that would result in a true
number sentence.
1. . Substitute for .
2. .Substitute for .
3. . Substitute for .
4. .Substitute for .
5. .Substitute for .
6. . Substitute for .
7. . Substitute for .
8. . Substitute for .
9. . Substitute for .
10. . Substitute for .
3. Lesson 23: True and False Number Sentences
Date: 4/23/14 S.102
102
©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 23
Lesson Summary
Number Sentence: A number sentence is a statement of equality (or inequality) between two numerical
expressions.
Truth Values of a Number Sentence: A number sentence that is an equation is said to be true if both numerical
expressions evaluate to the same number; it is said to be false otherwise. True and false are called truth values.
Number sentences that are inequalities also have truth values. For example, , , and
are all true number sentences, while the sentence is false.
Problem Set
Substitute the value into the variable and state (in a complete sentence) whether the resulting number sentence is true
or false. If true, find a value that would result in a false number sentence. If false, find a value that would result in a true
number sentence.
1. . Substitute for .
2. . Substitute for .
3. . Substitute for .
4. . Substitute for .
5. . Substitute for .
Create a number sentence using the given variable and symbol. The number sentence you write must be true for the
given value of the variable.
6. Variable: Symbol: The sentence is true when is substituted for .
7. Variable: Symbol: The sentence is true when is substituted for .
8. Variable: Symbol: The sentence is true when is substituted for .
9. Variable: Symbol: The sentence is true when is substituted for .