 # G6 m4-e-lesson 15-t

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Information about G6 m4-e-lesson 15-t

Published on March 31, 2014

Author: mlabuski

Source: slideshare.net

Lesson 15: Read Expressions in Which Letters Stand for Numbers Date: 3/31/14 147 ©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 Student Outcomes  Students read expressions in which letters stand for numbers. They assign operation terms to operations when reading.  Students identify parts of an algebraic expression using mathematical terms for all operations. Classwork Opening Exercise (10 minutes) Opening Exercise Complete the graphic organizer with mathematical words that indicate each operation.Some words may indicate more than one operation. Have different students share the vocabulary words they wrote in each category. If students are missing vocabulary words in their graphic organizers, have them add the new words. At the end of the opening exercise, every student should have the same lists of vocabulary words for each operation. Example 1 (13 minutes) Have students write down an expression using words. Encourage students to refer back to the graphic organizer created during the opening exercise. After providing students time to write each expression, have different students read each expression out loud. Each student should use different mathematical vocabulary. ADDITION SUBTRACTION MULTIPLICATION DIVISION SUM ADD MORE THAN TOTAL ALL TOGETHER IN ALL INCREASED BY PLUS DIFFERENCE SUBTRACT FEWER THAN MINUS LESS THAN HOW MANY MORE LEFT DECREASED BY PRODUCT MULTIPLY TIMES EVERY DOUBLE, TRIPLE OF AS MUCH QUOTIENT DIVIDE EACH PER SPLIT EXPONENTS POWER SQUARED CUBED

Lesson 15: Read Expressions in Which Letters Stand for Numbers Date: 3/31/14 148 ©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 Example 1 a. Possible answers: minus ; the difference of and ; a decreased by ; subtracted from . b. Possible answers: the product of and ; multiplied by y; times . c. Possible answers: added to the product of and f times plus ; the sum of multiplied by and . d. Possible answers: minus cubed; the difference of and the quantity to the third power. e. Possible answers: add to the product of and the difference of and ; times the quantity of minus added to . f. Possible answers: find the quotient of and the sum of and ; divided by the quantity plus .  Why is divided by plus not a correct answer?  Possible answer: divided by plus would indicate that we divide and first and then add , but this is not what the expression is showing. Exercises (12 minutes) Students work with a partner to complete the following problems. Exercises Circle all the vocabulary words that could be used to describe the given expression. 1. 2. Scaffolding: If students are using the vocabulary words well or finish early, ask students to write two different expressions for Exercises 1–4. ADDITION SUBTRACTION MULTIPLICATION DIVISION SUM DIFFERENCE PRODUCT QUOTIENT MP. 6

Lesson 15: Read Expressions in Which Letters Stand for Numbers Date: 3/31/14 149 ©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 3. 4. Write an expression using vocabulary words to represent each given expression. 5. Possible answers: minus the product of and ; times subtracted from ; decreased by doubled. 6. Possible answers: times the quantity of increased by ; the product of and the sum of and ; multiplied by the total of and . 7. Possible answers: the sum of and divided by ; the quotient of the total of and , and ; plus split into equal groups. 8. Possible answers: cube minus ; to the third power decreased by . 9. Possible answers: minus the quotient of and ; split into groups then subtracted from ; divided by less than . 10. Possible answers: divided by ; the quotient of and ; divided into parts Closing (5 minutes)  Peter says the expression is three times decreased by . Is he correct? Why or why not? Exit Ticket (5 minutes) ADD SUBTRACT MULTIPLY DIVIDE MORE THAN LESS THAN TIMES EACH

Lesson 15: Read Expressions in Which Letters Stand for Numbers Date: 3/31/14 150 ©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 Name Date Lesson 15: Read Expressions in Which Letters Stand for Numbers Exit Ticket 1. Write twowordexpressions for each problem using different math vocabulary for each expression. a. b. 2. List five different math vocabulary words that could be used to describe each given expression. a. b.

Lesson 15: Read Expressions in Which Letters Stand for Numbers Date: 3/31/14 151 ©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 Exit Ticket Sample Solutions 1. Write two wordexpressions for each problem, using different math vocabulary for each expression. a. Possible answers:The product of and minus . less than times . b. Possible answers:The quotient of and the quantity of plus . divided by the sum of and . 2. List five different math vocabulary words that could be used to describe each given expression. a. Possible answers: difference, subtract, product, times, quantity, add, sum. b. Possible answers: quotient, divide, split, product, multiply, times, per, each. Problem Set Sample Solutions 1. List five different vocabulary words that could be used to describe each given expression. a. Possible answers: sum, add, total, more than, increase, decrease, difference, subtract, less than. b. Possible answers: difference, subtract, fewer than, triple, times, product. c. Possible answers: quotient, divide, split, per, sum, add, increase, more than. 2. Write an expression using math vocabulary for each expression below. a. Possible answers:The product of and minus . less than times . b. Possible answers:The quotient of and . split into equal groups. c. Possible answers: plus the quantity minus . increased by the difference of and . d. Possible answers: plus twice . The total of and the product of and .

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