Building and Breaking [Brackets]3-8 Students will use the order of operations to

evaluate expressions with whole numbers and decimals.

PEMDAS Reviewhttps://www.youtube.com/watch?v=4xsyXu9J8C

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PEMDAS – What does it mean?P

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Parentheses ( )

Exponents x2

Multiply ×

Divide÷

Add +

Subtract −

Practice PEMDAS

10 x (21 ÷ 3) + 2 =

You try… PEMDAS

On your white boardWrite the problemLabel the stepsSolve.

12 x (16 ÷ 4) + 32

Problem # 1Zach collects baseball cards and keeps them in a binder. Today he bought 3 new packs of cards. Each pack had 15 cards inside. Zack added the new cards to the 27 he already had in his binder. If each page in the binder holds 9 cards, how many pages are full now?

Underline important informationDraw a pictureWrite an equation. Solve

You try… PEMDAS

Write the problem. Label the steps 1st - 4th. Solve.

[ (7.3 + 3.6) - 4.7 ] + 1.8 =

Notes3-8 Notes

“Brackets are used in place of a second set of parentheses and are evaluated right after them.”

P parentheses[B] bracketsE exponentsM multiplyD divideA addS subtract

Example 1[ (15 x 3) + 27 ] ÷ 9 =

P [ 45 + 27 ] ÷ 9 =

B 72 ÷ 9 =

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D = 8

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Brackets

P B EMDAS

White Board PracticeTake out your white boards and try these

problems.

When you answer two questions correctly, you may begin your homework. 3-8

Homework 3-8Work independently.

Use a blank piece of paper to show your work.

Try each problem.

Raise your hand if you have a question.