Math Journal 8-14 Evaluate the expressions for:

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Presentation transcript:

Math Journal 8-14 Evaluate the expressions for: a = 3, b = 5, c = -5, d = -2 −4𝑎𝑏𝑐 𝑑

Unit 1 day 4: Evaluating Expressions with PEmdas Essential Questions: What order do you follow to evaluate an expression?

P arenthesis E xponents M ultiplication D ivision A ddition S Order of Operations Mathematicians have established an order of operations to evaluate an expression involving more than one operation. P arenthesis E xponents M ultiplication from left to right D ivision A ddition from left to right S ubtraction

Example 1 a) 32 – 16 + 2 b) 15 •2 ÷ 6 c) 12 + 6 ÷ 3 – 2 d) 7 • 4 8 + 72 - 1

Evaluate the expressions when a = 2, b = -3, and c = -6. Example 2 Evaluate the expressions when a = 2, b = -3, and c = -6. a) a + bc b) c) 2c b 3c • 2a c 3c • 2a c

Example 3 You and four friends decided to order pizzas. Each pizza costs $9.00. You order 3 pizzas and everyone gets a soda for $1.50 each. If you want to split the bill evenly, how much will each person pay? 9(3) + 1.50(5) 5 27 + 7.50 5 34.50 5 $6.90 per person

Summary Essential Questions: What order do you follow to evaluate an expression? Use 1 minute to write 2 sentences answering the essential questions.