This document contains notes from a math lesson on writing products as sums and sums as products. The lesson covered expressing arrays using expressions by representing squares as factors and rectangles as sums. Students practiced rewriting expressions and determining if expression models were equivalent through substitution. The lesson concluded with a problem set for homework.

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Wednesday, December 17, 2015
Lesson 3­3: Writing Products as Sums and Sums as Products
HW: Lesson 3 Problem Set #1, 2, 3, 4 cdgh, 5
Do Now:
Exit Ticket: Lesson 2

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Exit Ticket Answer

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11

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S.12

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S.12

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Expression Model Re-Write
3(2x + 4)
1
-1
x
x x
1
1
1
1
x x
1
1
1
1
x x
1
1
1
1

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Expression Model Re-Write
x
2(2x - 3)
1
-1
x x
-1
-1
-1
x x
-1
-1
-1

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x
1
S.13

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Page S.13
or

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3x + 6
How many squares are there?
How many rectangles are there?
How do we represent this array with an expression?

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Page S.14

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Page S.14
55176

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Are these models equivalent??

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Are these models equivalent??

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Page S.14
Use substitution.
tap for
answer

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Page S.14

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Page S.15

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Page S.15

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Page S.16

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Page S.17

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Page S.17
s
s + 2
s
s + 2

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OR

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Problem Set S.18

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Closing:

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