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# Building and Breaking [Brackets]

Building and Breaking [Brackets]. 3-8 Students will use the order of operations to evaluate expressions with whole numbers and decimals. PEMDAS Review. https://www.youtube.com/watch?v=4xsyXu9J8CA. PEMDAS – What does it mean?. P E M D A S. Parentheses ( ) Exponents x 2 Download Presentation ## Building and Breaking [Brackets]

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1. Building and Breaking [Brackets] 3-8 Students will use the order of operations to evaluate expressions with whole numbers and decimals.

3. PEMDAS – What does it mean? • P • E • M • D • A • S Parentheses ( ) Exponents x2 Multiply × Divide ÷ Add + Subtract −

4. Practice PEMDAS 10 x (21 ÷ 3) + 2 =

5. You try… PEMDAS On your white board • Write the problem • Label the steps • Solve. 12 x (16 ÷ 4) + 32

6. Problem # 1 Zach 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 information • Draw a picture • Write an equation. • Solve

7. You try… PEMDAS • Write the problem. • Label the steps 1st - 4th. • Solve. [ (7.3 + 3.6) - 4.7 ] + 1.8 =

8. Notes 3-8 Notes “Brackets are used in place of a second set of parentheses and are evaluated right after them.” P parentheses [B] brackets E exponents M multiply D divide A add S subtract

9. Example 1 P B EMDAS [ (15 x 3) + 27 ] ÷ 9 = P [ 45 + 27 ] ÷ 9 = B 72 ÷ 9 = E M D = 8 A S Brackets

10. White Board Practice • Take out your white boards and try these problems. • When you answer two questions correctly, you may begin your homework. 3-8

11. Homework 3-8 • Work independently. • Use a blank piece of paper to show your work. • Try each problem. • Raise your hand if you have a question.

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