Math Test
Feb 22, 2019 20:13:25 #
Dikdik
Loc: Winnipeg, Canada
Dannj wrote:
Did you use a formula for this? I got the same result by a brief trial and error approach. Started with each son getting 1250 and adjusting from there.
I set x=wife, 2x=daughter, and 6x=son and total is 1x + 4(2x) + 5(6x) = 8000, and 39x = 8000 and x = 205.128approx.
Yours was a good initial guess...
Dik
Feb 22, 2019 20:24:17 #
Dannj wrote:
Respectfully disagree. The order of operations takes precedence regardless. It’s 12.
Perhaps in New Math, but not in logic.
Feb 22, 2019 20:39:51 #
Shellback wrote:
PEMDAS or br Parentheses br Exponents br Multip... (show quote)
That's how I saw it using my limited skills learned in the 1970s. If there are no parentheses do the multiplication and or division first then the addition/subtraction.
Feb 22, 2019 20:44:35 #
Kozan
Loc: Trenton Tennessee
jerryc41 wrote:
This type of computation drives a friend of mine crazy, and he refuses to accept the correct answer.
Multiplication and division is always done before addition and subtraction.
Answer is 12.
Feb 22, 2019 20:50:44 #
Dikdik
Loc: Winnipeg, Canada
DeanS wrote:
Perhaps in New Math, but not in logic.
From Wiki:
1646 - In Van Schooten's 1646 edition of Vieta, B in D quad. + B in D is used to represent B(D^2 + BD).
1800s - The term "order of operations" was starting to get used in textbooks. It was used more by textbooks than mathematicians. The mathematicians mostly just agreed without feeling the need to state anything official.
1920s - In this time period, the mathematicians were debating about whether or not multiplication should take precedence over division. Although they'd still argue over who won this argument, today it's become most common (and taught predominantly) that multiplication and division are equal, read from left to right. The reasoning is to keep it simple and to let the parentheses do it's thing!
Dik
Feb 22, 2019 21:33:17 #
Dikdik
Loc: Winnipeg, Canada
DeanS wrote:
Perhaps in New Math, but not in logic.
Even with 'old math'.
Feb 22, 2019 21:49:21 #
DanielB wrote:
Photography rules, math drools.
Without math photography would not even exist.
Feb 22, 2019 21:50:00 #
DeanS wrote:
Perhaps in New Math, but not in logic.
Well, I thought the term “New Math” came and went several decades ago and we could continue to go back and forth on this but I don’t see the point. I’ll stick with 12.
Feb 22, 2019 21:57:47 #
Dikdik
Loc: Winnipeg, Canada
10MPlayer wrote:
Maybe I should put up a pic of me in a tux playing my sax.
Ohhhh... I love sax and violins...
Dik
Feb 23, 2019 00:26:51 #
cdayton wrote:
Best answer but what’s the question?
No one knows. The earth was destroyed too soon.
Feb 23, 2019 01:18:58 #
12 multiplication takes prescidence over addition and substraction. 3x3=9+3=12-3=9+3=12
Feb 23, 2019 01:31:27 #
Dikdik
Loc: Winnipeg, Canada
Dannj wrote:
Well, I thought the term “New Math” came and went several decades ago and we could continue to go back and forth on this but I don’t see the point. I’ll stick with 12.
New Math isn't relevant... a bit of a 'red herring'.
Dik
Feb 23, 2019 01:42:44 #
Shellback wrote:
PEMDAS or br Parentheses br Exponents br Multip... (show quote)
I'm a math teacher, and I rename PEMDAS as GEMDAS for my upper level kids, as Grouping elements of all kinds must be a priority.... () [] {} numerators, denominators, and radicals all have to be accounted before moving on...... :)
Feb 23, 2019 06:57:26 #
Feb 23, 2019 08:00:59 #
markngolf wrote:
Yes, of course. However, those components are not needed to simplify the expression.
Mark
Mark
Or crumple up the paper the problem is written on.
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