This example clarifies the purpose of order of operations: to have ONE way to interpret a mathematical statement.
Order of operations 2 is a free educational video by Khan Academy.It helps students in grades 6 practice the following standards 6.EE.2.B.
1. 6.EE.2.B : Identify parts of an expression using mathematical terms (sum, term, product, factor, quotient, coefficient); view one or more parts of an expression as a single entity. For example, describe the expression 2(8 + 7) as a product of two factors; view (8 + 7) as both a single entity and a sum of two terms. .
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