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Votes:0 --> Ask Dr. Math: FAQ O rder of O perations Dr. Math FAQ || Classic Problems || Formulas || Search Dr. Math || Dr. Math Home What is the correct order of operations? Why use it? What is PEMDAS? The order of operations in which one is to interpret a mathematical
expression such as "2+3 * 5" is a convention. This means that a long time ago, people just decided on an order in which operations should be performed. It has nothing to do with magic or logic. Some people decided to adopt a way, and it has stuck ever since. It just makes communication a lot easier. Another way of saying this is that rather than being inherent in the structure of mathematics, the concept of "order of operations" is a matter of mathematical notation. Order of operations refers to which operations should be performed Read More Go to Site
Votes:0 Order of Operations Unit 7 Problem: Evaluate the following arithmetic expression: 3 + 4 x 2 Solution: Student 1 Student 2 3 + 4 x 2 3 + 4 x 2 = 7 x 2 = 3 + 8 = 14 = 11 It seems that each student interpreted the problem differently, resulting in two different answers. Student 1 performed the operation of addition first, then multiplication; whereas student 2 performed multiplication first, then addition. When performing arithmetic operations there can be only one correct answer. We need a set of rules in order to avoid this kind of confusion. Mathematicians have devised a standard order of operations for calculations involving more than one arithmetic operation. Rule 1: First perform any calculations inside parentheses. Rule 2: Next perform all multiplications and divisions, working from le Read More Go to Site
Votes:0 Sorted by Grade Level Study Basic Math Skills Unlimited Interactive Practice Explanations and Examples Challenge Games Hundreds of Pages Kindergarten | First | Second | Third | Fourth | Fifth | Sixth | Seventh | Eighth Contact AAAMath Buy the AAAMath CD Sorted by Subject Addition Algebra Comparing Counting Decimals Division Equations Estimation Exponents Fractions Geometry Graphs Measurement Mental Math Money Multiplication Names of Numbers Patterns Percent Place Value Practical Math Properties Proportions Statistics Subtraction Please tell others about this site. Properties - Table of Contents Properties - Topics Properties Return to Top Properties - Lessons Inverse Relationship between Addition and Subtraction Inverse Relationship between Subtraction and Addition Inverse Relationship bet Read More Go to Site
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