WARMUPS

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WARMUPS

• (12 9)2 (4 - 2) 62 24
• (9 3)( 12 10)(3) -12

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VARIABLES AND EXPRESSIONS

• CHAPTER 1-3

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VARIABLES

• VARIABLE
• IT IS A PLACEHOLDER
• IT IS USUALLY LETTERS
• A VARIABLE IS A LETTER OR SIGN THAT REPRESENTS A
  NUMERICAL VALUE.
• WE USE VARIABLES IN MATH SENTENCES OR EXPRESSIONS.

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EXAMPLES OF VARIABLES

• X
• Y
• G
• B
• A
• W
• _at_

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WHAT IS AN EXPRESSION?

• AN EXPRESSION IS
• A COMBINATION OF NUMBERS
• A COMBINATION OF VARIABLES
• USES AT LEAST ONE MATH OPERATION
• ADD, SUBTRACT, DIVIDE, MULTIPLY

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EXAMPLES OF EXPRESSIONS

• A 2A 1/2 A
• 5 A 33 A
• 12(_at_) 3 - _at_
• 24R 16r 35 5r
• 24A 3B 5A 16B

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AN EXPRESSION NEVER, NEVER, NEVER, NEVER, NEVER,
NEVER, NEVER, NEVER NEVER HAS

• AN EQUAL SIGN!!!!!

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IF a 3, b 4, c 5

• EVALUATE EACH EXPRESSION
• a 5
• 3 5
• 8

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IF a 3, b 4, c 5

• EVALUATE EACH EXPRESSION
• a b ( c )
• 3 4 ( 5 )
• 3 20
• 23

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IF a 3, b 4, c 5

• EVALUATE EACH EXPRESSION
• a b c
• 3 4 5
• 7 5
• 12

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YOU DO THE MATHIF a 3, b 4, c 5

• EVALUATE EACH EXPRESSION
• (a)(b)(c)
• a b c

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YOU DO THE MATH

• SIMPLIFY THIS EXPRESSION
• A A C 3 C

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YOU DO THE MATH

• SIMPLIFY THIS EXPRESSION
• AB A AB 3 A

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HOMEWORK EXERCISE 30 DO 1 TO 20

• IF YOU CAN DO THESE YOU ARE A SUPER MATHEMATICIAN