5TH GRADE - UNIT 9 REVIEW - PFA

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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 acronym PEMDAS helps remember the order: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

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What does the term 'expression' mean in mathematics?

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An expression is a combination of numbers, variables, and operators (such as +, -, ×, ÷) that represents a value. It does not include an equality sign.

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What is a pattern in mathematics?

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A pattern is a repeated or predictable sequence of numbers, shapes, or other elements. Patterns can be numerical, geometric, or algebraic.

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How do you solve an equation?

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To solve an equation, you find the value of the variable that makes the equation true. This often involves isolating the variable on one side of the equation.

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What is a variable in mathematics?

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A variable is a symbol (often a letter) that represents an unknown value in an expression or equation.

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What does it mean to evaluate an expression?

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To evaluate an expression means to calculate its value by substituting numbers for the variables and performing the operations.

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What is the value of the expression: 24 ÷ 6 x 3 + (5 – 2 x 2)?

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The value is 13.

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How do you identify the next number in a numerical pattern?

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To identify the next number in a numerical pattern, look for a rule or relationship between the numbers in the sequence.

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What is the meaning of 'equation'?

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An equation is a mathematical statement that asserts the equality of two expressions, typically containing one or more variables.

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What is the solution to the equation 2x = y?

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The solution expresses y in terms of x, meaning y equals two times x.