Welcome to Class #9! Don’t turn in homework yet!!!! 10/29/14 Warmup Go over Sample Test 3 with your team. If you have questions, write them on the board. 12/1/2015copyright All Rights Reserved. 1

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1.Review for Test #3 by going over sample test in teams 2.Using algebra tiles to combine similar terms 3.Test #3 Agenda 10/29/14

Combining Similar Terms using Algebra Tiles

Each pair of students needs a package of algebra tiles. Have resource managers get these. Rules for working with tiles: Clear off your desks and put tiles on a piece of paper. Pick up any tiles that drop on floor! DO not break any tiles apart! The 5-unit tiles are supposed to be attached. Return them to the plastic bag after working with them.

Naming the tiles

2-3 Jumbled Piles (p. 41) Your teacher will show you a jumbled pile of algebra tiles and will challenge you to name all of them. What is the best description for the collection of tiles? Is your description the best possible?

Do problem 2-4 (p. 42) with your team: Build each collection of tiles represented below. Then name the collection using a simpler algebraic expression, if possible. If it is not possible to simplify the expression, explain why not.

2-4 a)

2-4 b)

2-4 c)

2-4 d)

Math Notes box – Combining Like Terms (P. 57)

2 p - 5q 6 1 Simplify by combining like terms. 1) 7x - 4y + 2x - y 2) 3m + 10n - 4m + 1 3) 7x + 3y 4) 6x - (5x) + 2x + (-3) 5) 4k - (2j) - 6k - j 6) x + 3y - 17x 7) 6r - 2.3s - -9r - 3.5s 8) 9) m - - m ) 8e + 3f + (-5e) - -5f 9x - 5y -m + 10n + 1 7x + 3y 3x k - 3j -21x + 3y r - 5.8s -13m e + 8f

More examples of combining like terms Two methods: 1. Work horizontally 12/1/2015copyright All Rights Reserved. 15

Two methods: 2. Work vertically 12/1/2015copyright All Rights Reserved. 16

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Perimeter problems P /1/2015copyright All Rights Reserved. 18

HW #9 – Extra practice booklet topic #2 “Combining like terms” Textbook Chapter 2 # 2-8, 2-9, 2-10, 2-20, 2-43, 2-45,