Lesson 23: True and False Number Sentences
Date: 4/23/14 S.100
100
©2013CommonCore,Inc. Some rights reserved.commoncore.or...
Lesson 23: True and False Number Sentences
Date: 4/23/14 S.101
101
©2013CommonCore,Inc. Some rights reserved.commoncore.or...
Lesson 23: True and False Number Sentences
Date: 4/23/14 S.102
102
©2013CommonCore,Inc. Some rights reserved.commoncore.or...
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G6 m4-g-lesson 23-s

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G6 m4-g-lesson 23-s

  1. 1. Lesson 23: True and False Number Sentences Date: 4/23/14 S.100 100 ©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 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. 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. 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 .

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