1-1 Symbols and Expressions 1-2 Commutative and Identity Properties

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1-1 Symbols and Expressions1-2 Commutative and
Identity Properties

• 9N1 Identify properties
• 9N2 Compare equivalent forms of rational numbers
• 9N4 Develop fluency in computation

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Vocab
x y z

• Variable (1-1) Letter(s) used to represent
  numbers Change or unknown
• Evaluate(1-1) Find value of

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Sets of Numbers
Real Numbers (R)- set of rational and irrational
numbers
Rational Numbers (Q) Can be written in form a/b
(b ? 0)( fractions- create decimals that repeat
or terminate)
Integers (Z)-( Negative integers, 0 ,
Positive integers )
Natural Numbers (N)- counting
Whole Numbers (W)- 0 N
Irrational Numbers (I)- Cannot be written in the
form a/b (roots- decimals that do not repeat or
terminate)
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Examples
REMEMBER P Parenthesis or grouping symbols E
Exponents MD Multiply or divide (left to
right) AS Add or subtract (left to right)

• Simplify

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Evaluate
for x 2 and y5
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Commutative Property(1-2) switches the order of
the numbers being added or multiplied

• CPA CPM
• a b b a abba
• 3x4 34x 4a2 42a
• Helps us simplify expressions

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Identity Property A number stays the same(keeps
its identity) if you add zero or multiply by 1

• IPA IPM
• a 0 a 1x x
• x 2(-2) x 4xy 2x
• 2y
• We use this property when solving equations and
  simplify fractions
• h 3 -3 is really h 0 or h

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Examples

• Simplify
• 1) 2) You Try)

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Marker Board (pg 8)

• 31
• 35
• Pg 14
• 5
• 21
• 23
• 29

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Assignment

• 1-1/8/34-50e
• 1-2/14/3,8,16-32e, 36-38