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1.11: Mental Math for Addition and Subtraction Equations

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

Algebraic Expression

An expression that has numbers, operations and variables, but no equals sign.

Equation

An equation is a mathematical sentence that describes two equal quantities. Equations contain equals signs.

Variable Equation

A variable equation is a mathematical sentence that contains at least one variable or unknown quantity and an equals sign.

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Difficulty Level:
At Grade
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Date Created:
Nov 30, 2012
Last Modified:
Feb 19, 2016
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MAT.ALG.223.L.1