Multiplication And Division Essay

991 Words2 Pages

We need a common set of rules for calculations. Many years ago, mathematicians developed a standard operating order that tells us what to do first operations in an expression with more than one operation. Without a standard procedure for calculations, two people could get different results for the same problem. For example, 3 + 5 • 2 has only one correct answer. Is it 13 or 16? The order of addition, subtraction, multiplication and division First, consider expressions involving one or more arithmetic operations: addition, subtraction, multiplication, and division. The order of operations requires that all multiplications and divisions are done first, going from left to right in the expression. The order in which multiplication and division are calculated …show more content…

32 • 23 This problem has exponents and multiplication 9 • 8 Simplifies 32 and 23. 72 Performs multiplication. Answer 32 • 23 = 72 Example Problem Simplifies (3 + 4) 2 + (8) (4). (3 + 4) 2 + (8) (4) This problem has parentheses, exponents, and multiplication. The first set of brackets is a symbol of product. It indicates that the second set is multiplication. Grouping symbols are handled first. 72 + (8) (4) 49 + (8) (4) Add numbers inside the parentheses serve as grouping symbols. Simplifies 72. 49 + 32 Performs multiplication. The order of operations 1) Make all operations starting in groups. Grouping symbols include parentheses (), braces {}, brackets [], and fraction bars. 2) Evaluate the exponents and roots of numbers such as square roots. 3) Multiplicay divides, from left to right. 4) Addition and subtraction from left to right. Some people use a phrase to help you remember the order of operations. The phrase is called PEMDAS or "Please Excuse My Dear Aunt Sally." The first letter of each word begins with the same letter of the arithmetic operation. Please Parentheses (and other grouping symbols) Excuse

More about Multiplication And Division Essay

Open Document