I recall the Order of Operation in an arithmetic equation was/is: Parentheses - Power (Exponent, in some terms) - Multiplication/Division - Addition/Subtraction. This could be remembered by the memonic fo PPMDAS - Pretty Please My Dear Aunt Sally. M/D & A/S are worked from left to right in order.
Thus, the equation would go: 6ï¿½2(1+2) 6ï¿½2*3 3*3 9 Yes, that is my final answer.
Others work out of 'left-to-right' sequence & come up with: 6ï¿½2(1+2) 6ï¿½2(3) 6ï¿½6 1
Last edited by Beetlemess; 04/28/1102:31 PM.
-B- "We do not inherit the Earth from our ancestors, we borrow it from our children."
My husband is the math expert, not me, although I do help students with it in the private school I volunteer at. I will ask others at school about it Monday and will have my husband look at it again later when he gets home, but from what I have learned, it is worked in the following way.
You need to use distributive property in this problem. First things first, (1+2) =3 .
6 / 2(3) 6 / 6 = 1
You need to eliminate the parentheses before you can move on to dividing.
Well I'm definitely no rocket scientist, but I have stayed in a Holiday Inn Express! :)
I also had a middle school algebra teacher who REFUSED to let me sleep in his class (Thank you Mr.Brammer!)
I consulted [i]Basic Rules of Algebra, Algebraic Fractions, Laws of Exponents, and Roots/Radicals[/i] by Charles Ormsby.
He states "Letters or symbols should be considered placeholders for numbers...)
Let's replace the 2 inside the parenthesis with x and see how this problem works out
6 / 2(1+x)
6 / (2+2x)
or on a blackboard would be written
plug 2 back in for x and you get 1
You are correct Lisa
Using a variable forces you to keep the parenthesis and use the distributive property, which you should do anyway.
Mr.Brammer forced us to work hundreds of these on the blackboard in front of the class. (This was before schools worried about kid's "self esteem) He didn't care to berate you a little if you kept getting them wrong.
Thanks again Mr.Brammer, RIP
Well we know to do the brackets first and 2+1 = 3 but when once you get 6/2(3) the question is, where do you go from there? If it were written 6 / 2 x 3 the answer would be 9 but if the 3 were an x and it were written 6/2x, the answer would be 1
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