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7.4 Parentheses in Number Sentences SRB pgs. 203-204

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Parentheses Parentheses tell you what to answer first in a number sentence. Solve the parentheses number expression first and drop the rest of the problem using the order of operations. Parentheses may be added to a number sentence to make it true.

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Example 3 + (4 x 2) – 1 3 + 8 – 1 11 – 1 10

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Nested Parentheses Nested Parentheses are more than one set of parentheses in a number sentence. *You must have the same number of parentheses facing each other. Solve the problem by completing the first set of closed parentheses first.

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Example ((2 + 1 ) 4 ÷ 9) – 1 (3 4 ÷ 9) – 1 (81 ÷ 9) – 1 9 – 1 8

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Example (4 2 - (3 x 3)) + 1 (4 2 - 9) + 1 (16 - 9) + 1 7 + 1 8

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© 2007 M. Tallman. Commutative Property © 2007 M. Tallman The order of the factors does not change the product. 15 53 × = factors product 5 × 3 = 3 ×

© 2007 M. Tallman. Commutative Property © 2007 M. Tallman The order of the factors does not change the product. 15 53 × = factors product 5 × 3 = 3 ×

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