MP2 9 Wk Review - 1ST PD

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What is the order of operations in mathematics?

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The order of operations is a set of rules that determines the sequence in which calculations are performed. The order is: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). Often remembered by the acronym PEMDAS.

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CCSS.7.NS.A.3

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3

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CCSS.7.NS.A.3

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What is an equivalent expression for 9y?

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6y + 4y - y

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CCSS.6.EE.A.4

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What does it mean for two expressions to be equivalent?

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Two expressions are equivalent if they have the same value for all values of the variables involved.

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CCSS.6.EE.A.4

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What is a variable in mathematics?

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A variable is a symbol, often a letter, that represents a number in mathematical expressions or equations.

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CCSS.6.EE.A.2B

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What is an expression in mathematics?

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An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

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CCSS.6.EE.A.2B

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8

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CCSS.6.EE.A.1

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11 (because multiplication is performed before addition).

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CCSS.5.OA.A.1

CCSS.5.OA.A.2

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What is the definition of a mathematical equation?

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A mathematical equation is a statement that two expressions are equal, often containing an equals sign (=).

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CCSS.6.EE.A.2C

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What is the purpose of parentheses in mathematical expressions?

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Parentheses are used to indicate which operations should be performed first in an expression.

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CCSS.6.EE.A.2C