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- 1. Order of Operations By: Billy Heming
- 2. What Are the Order of Operations Parentheses (and Division Bars) Exponents Multiplication Division Addition Subraction You can remember these with the acronym PEMDAS PLEASE EXCUSE MY DEAR AUNT SALLY
- 3. Starting a Problem ALWAYS START A PROBLEM BY WRITING PEMDAS NEXT TO THE PROBLEM
- 4. Parentheses ( ) • Parentheses and Division Bars are first in PEMDAS. • Do what is inside them first when starting a problem • When you get inside the parentheses, start over with PEMDAS • Example: 5(4+6x7)= 5(4+42)= 5(46)= 230 • When you have a division bar, do what is on the top and then divide the top number by the bottom number. • Example: 6+18 =24 =3 8 8
- 5. Exponents 52 • Exponents are the same as powers. • Solve exponents after all parentheses and division bars are solved. • Example: 24x2=32 o 24is equal to 2x2x2x2 4x2x2 8x2 16
- 6. Multiplication and Division 10x3 20/5 • You start multiplication and division after all parentheses, division bars, and exponents are solved. • When solving multiplication and division, you go from left to right. • Say you have 20 divided by 2 times 3, for example, you would not do 2 times 3 and then divide 20 by 6. • Instead you would divide because it is first from left to right. 20 divided by 2 equals 10. Then you multiply 10 and 3, which equals 30. That is your answer.
- 7. Addition and Subtraction 8+7 20-13 • Addition and subtraction are started after everything else is finished. • Just like multiplication and division, you go from left to right. • Examples: 8+7=15 20-13=7 o Another example with both: 27+43-50= First, you do 27+43=70 Now subtract. 70-50=20
- 8. Checking your work • Checking your work is very important. • Make sure to always check your work. • You can check with a calculator or by hand.
- 9. Where I got my photos • http://www.inmagine.com/searchterms/calculators-3.html • http://www.inmagine.com/searchterms/math.html • http://www.inmagine.com/searchterms/math_equations.html
- 10. MY PROBLEM: 5x(32)-(30/10+13) +183=?

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