EXAMPLE 3 Using the Associative Property 3 5 + 2 5 3+ = 3 5 + 2 5 +3 5 5 +3 = Associative property of addition Add fractions. Write as one. 5 5 Add. 4=

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Presentation transcript:

EXAMPLE 3 Using the Associative Property = = Associative property of addition Add fractions. Write as one. 5 5 Add. 4= 1 + 3=

EXAMPLE 4 Using the Associative Property Commutative property of multiplication Associative property of multiplication Multiply inside grouping symbols. Multiply. (5 2) 11= 5 (11 2) 110= 5 (2 11)= 10 11=

GUIDED PRACTICE for Examples 3 and 4 Use properties to evaluate the expression. Commutative property of addition Associative property of addition Add inside grouping symbols. Add (– ) = 18 + (12 + (–34)) = ( ) + (–34) = 30 + (–34) = –4

GUIDED PRACTICE for Examples 3 and 4 Use properties to evaluate the expression. Commutative property of addition Associative property of addition Add inside grouping symbols. Add = 1 + 8= 9= = =

GUIDED PRACTICE for Examples 3 and 4 Use properties to evaluate the expression. Commutative property of multiplication Associative property of multiplication Multiply inside grouping symbols. Multiply (6 ) 1 12 = 6) ( 1 12 = 6 1 ( ) =16 = 6

GUIDED PRACTICE for Examples 3 and 4 Use properties to evaluate the expression. Commutative property of multiplication Associative property of multiplication Multiply inside grouping symbols. Multiply. =13 = (3 ) 5 6 = 3) ( = ( ) 3

GUIDED PRACTICE for Examples 3 and 4 Evaluate the expression using mental math ( 23) 1 4 = –4 ( 50 ) 46= – 4600 –21 –(–29)11. 0 = 0 (–6 ) ( ) = –6