5 Minute Check Complete on the back of your homework. 1. 9 + 12 - 15 2. (9 + 2) · 6 - 5 3. 26 + 6² ÷ 4 4. 22 ÷ 2 · 3².

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5 Minute Check Complete on the back of your homework (9 + 2) · ² ÷ ÷ 2 · 3²

5 Minute Check Complete on the back of your homework

5 Minute Check Complete on the back of your homework – – 15 6

5 Minute Check Complete on the back of your homework. 2. (9 + 2) · 6 - 5

5 Minute Check Complete on the back of your homework. 2. (9 + 2) · 6 – 5 11 ·

5 Minute Check Complete on the back of your homework ² ÷ 4

5 Minute Check Complete on the back of your homework ² ÷ ÷

5 Minute Check Complete on the back of your homework ÷ 2 · 3²

5 Minute Check Complete on the back of your homework ÷ 2 · 3² 22 ÷ 2 · 9 11 · 9 99

Flashcards

Wednesday, Nov 20 Lesson 6.3 Algebra: Variables and Expressions

Objective: To find the value of expressions using the order of operations.

Algebra: Variables and Expressions At the end of this lesson you should be able to answer the following question. How are numerical expressions and algebraic expressions different?

Algebra: Variables and Expressions Algebra is a language of symbols including variables.

Algebra: Variables and Expressions Algebra is a language of symbols including variables. A variable is a symbol, usually a letter, used to represent a number.

Algebra: Variables and Expressions Algebraic expressions contain at least one variable and at least one operation. e.g. n + 2

Algebra: Variables and Expressions Evaluate 16 + b, if b = How to solve an algebraic expression. Step 1 – Rewrite the expression without the variables.

Algebra: Variables and Expressions Evaluate 16 + b, if b = How to solve an algebraic expression. Step 2 – Use the order of operations to evaluate the expression.

Algebra: Variables and Expressions Evaluate x - y, if x = 64 and y = 27 Step 1 ?

Algebra: Variables and Expressions Evaluate x - y, if x = 64 and y = – 27 Step 2 ?

Algebra: Variables and Expressions Evaluate x - y, if x = 64 and y = – 27 37

Algebra: Variables and Expressions Evaluate x · y, if x = 6 and y = 7 Do this on your own.

Algebra: Variables and Expressions Evaluate x · y, if x = 6 and y = 7 6 · 7 Step 1 42 Step 2

Algebra: Variables and Expressions 1 Evaluate 6x, if x = 2 Do this on your own. Remember, if there is no operation written it is assumed to be multiplication.

Algebra: Variables and Expressions 1 Evaluate 6x, if x = ·

Algebra: Variables and Expressions Evaluate 6t + 4, if t = 3 Do this on your own.

Algebra: Variables and Expressions Evaluate 6t + 4, if t = 3 6 · Step Step 2 22 Step 2

Algebra: Variables and Expressions Evaluate 6c², if c = 3 Do this on your own.

Algebra: Variables and Expressions Evaluate 6c², if c = 3 6 · 3² 6 · 9 54

Algebra: Variables and Expressions 1 Evaluate 4x², if x= 8 Do this on your own.

Algebra: Variables and Expressions 1 Evaluate 4x², if x= · ( 8 )² ·

Algebra: Variables and Expressions 1 Evaluate 10a + 7, if a = 5 Do this on your own.

Algebra: Variables and Expressions 1 Evaluate 10a + 7, if a = ·

Algebra: Variables and Expressions 1 Evaluate 9e², if e= 3 Do this on your own.

Algebra: Variables and Expressions 1 Evaluate 9e², if e= · ( 3 )² · 9 9 1

Algebra: Variables and Expressions The amount of money that remains from a 20 dollar bill after Malina buys 4 party favors for p dollars each is 20 – 4p. Find the amount remaining if each favor is $3 each. Do this on your own.

Algebra: Variables and Expressions The amount of money that remains from a 20 dollar bill after Malina buys 4 party favors for p dollars each is 20 – 4p. Find the amount remaining if each favor is $3 each. $20 – 4p, if p = $3 $20 – 4 · $3 $20 - $12 $8

Algebra: Variables and Expressions The volume of a cube can be represented by s³, where s is the length of a side. If the length of a side of a cube is ½ meter, what is the volume? Do this on your own.

Algebra: Variables and Expressions The volume of a cube can be represented by s³, where s is the length of a side. If the length of a side of a cube is ½ meter, what is the volume? 1 ( 2 )³ = 8

Algebra: Variables and Expressions How are numerical expressions and algebraic expressions different?

Algebra: Variables and Expressions Agenda Notes Homework – Homework Practice 6-3 Due Thursday, Nov 21 Mid-Chapter 6 Quiz – Friday, Nov 22