Writing Numerical Expressions

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What is a numerical expression?

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A numerical expression is a mathematical phrase that includes numbers and operations but does not have an equality sign.

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What does the term 'sum' indicate in a numerical expression?

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The term 'sum' indicates the operation of addition (+).

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What does the term 'difference' indicate in a numerical expression?

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The term 'difference' indicates the operation of subtraction (-).

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What does the term 'product' indicate in a numerical expression?

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The term 'product' indicates the operation of multiplication (x).

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What does the term 'less than' indicate in a numerical expression?

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The term 'less than' indicates subtraction from a number.

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How would you express '4 less than the sum of 34 and 8' in numerical form?

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(34 + 8) - 4.

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How would you express 'four less than the difference of twenty-five and ten' in numerical form?

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(25 - 10) - 4.

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How would you express 'four less than the product of ten and eleven' in numerical form?

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(10 x 11) - 4.

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What is the first step in solving a numerical expression?

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Identify the operations involved and the order in which they should be performed.

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What is the order of operations in mathematics?

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The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.