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Published byGordon Trubey Modified over 2 years ago

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Order of Operations: What does it mean? Break it down into parts: Order Operations - Who goes first in line? of

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Soooooooooo……. The order of operations is the order in which EACH operation is performed in an expression or equation! 5 x 13 – 10 Who goes first? Do I multiply or subtract first? Why does it matter?

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Why??? There is a certain order in which multiplication, division, addition, and subtraction must be performed when they are grouped together. If you do not use the proper order, your answer will be incorrect!

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Just remember to excuse this lady: Aunt Sally!

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To remember which order to do each operation: P e MA SD Please Excuse My Dear Aunt Sally!

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P exponents MD AS Multiply or Divide Parentheses Add or Subtract ….and one more thing.

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YOU MUST ALWAYS SOLVE FROM LEFT TO RIGHT! (EVERY TIME!)

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To do this, get on the train and go in order from left to right following PeMDAS! Let’s try a few examples: Which operation would come first, second, etc… 1.13 + 25 x 4 2.72 ÷ 3 – 10 3.20 x (10 – 7)

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More practice time……

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