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2 + 3 x 4


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What do you think?  

16 members have voted

  1. 1. 2 + 3 x 4 =

    • 14
      8
    • 20
      8


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Neither, it's 24. Multiplication and division take priority over addition and subtraction. then you proceed from left to right. Use brackets next time to avoid any confusion.

How do you make 24 doug...?

I agree that mutiplication takes priority over addition. Hence 3 x 4 =12 plus 2 = 14

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Neither, it's 24. Multiplication and division take priority over addition and subtraction. then you proceed from left to right. Use brackets next time to avoid any confusion.

How do you make 24 doug...?

I agree that mutiplication takes priority over addition. Hence 3 x 4 =12 plus 2 = 14

Ditto. :D

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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 x 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 in what order, but it's just convention. The notation tells you which operations to do first, not something about the underlying mathematics.

To remember the conventional order of operations, you can think of

PEMDAS

(You might remember this as "Please excuse my dear Aunt Sally.")1

Parentheses

Exponents

Multiplication and Division

Addition and Subtraction

This means that you should do what is possible within parentheses first, then exponents, then multiplication and division (from left to right), and then addition and subtraction (from left to right). If parentheses are enclosed within other parentheses, work from the inside out.

Some people are taught to remember BEDMAS:

Brackets

Exponents

Division and Multiplication, left to right

Addition and Subtraction, left to right

Here are two examples:

3 + 5 x 7 = ?

3 + 5 x 7 = 3 + 35 = 38

(1 + 3) x (8 - 4) = ?

(1 + 3) x (8 - 4) = 4 x 4 = 16

I am quite confident that my dunces cap will remain in the cupboard. Hard luck those that voted for 20.

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I am the only one to vote for 14 so far - must I get my dunces cap ready...?.
I voted 14 too. :D

I used to use the term BODMAS (brackets, of, divide, multiply, add, subtract), so in this case, as the are no brackets, I multiplied the 3 x4 = 12, then added the 2 = 14.

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