PEMDAS Gone Learn Today: "Why you can't trust your calculator, or What is 48/2(9+3)?"

[newworldafro]

PEMDAS is probably ok as an "order of operations" ... but apparently calculators are having some issues .... interesting thread ....

http://www.abovetopsecret.com/forum/thread1000074/pg1

 

[IAmGettingAMailOrderBride]

The TI-86 should be right, but I do think some of those calculators got a few of my math questions wrong back in my algebra days

 

[the cac mamba]

 

[Jhoon]

the only answer is 2. for you to arrive at 288, you musy have taken a left at the wrong corner.

 

[Type Username Here]

Seems like user error to me along with lack of consistent programming by TI.

I see all these Facebook PEMDAS math things pop up and I think to myself: no one with common sense writes math in this ambiguous way. Parentheses and brackets all day ho.

 

[Serious]

 

[ADK]

The yellow TI Calcs are updated.

 

[-DMP-]

I would never put mine in all at the same time ()

I would automatically enter it as parentheses , get that answer, then multiplication etc.

Can't be to careful when taking math tests.

-DMP-

 

[Jhoon]

I would never put mine in all at the same time ()

I would automatically enter it as parentheses , get that answer, then multiplication etc.

Can't be to careful when taking math tests.

-DMP-

then there is the problem of using calculators.

 

[NoMayo15]

the only answer is 2. for you to arrive at 288, you musy have taken a left at the wrong corner.

See, I was taught that division and multiplication are ... equal so to speak, so you always go from left to right:

48 / 2 (9+3) =
48 / 2 (12) =
24 (12) =
288.

I don't know why you multiplied before you divided.

 

[IAmGettingAMailOrderBride]

the only answer is 2. for you to arrive at 288, you musy have taken a left at the wrong corner.

How'd u get 2

 

[Domingo Halliburton]

How'd u get 2

doing the multiplication before the division.

48/2(9+3)
48/2(12)
48/24=2

 

[JAY?]

This was like a 36884 page thread on boxden that didn't get a conclusion

 

[Jhoon]

See, I was taught that division and multiplication are ... equal so to speak, so you always go from left to right:

48 / 2 (9+3) =
48 / 2 (12) =
24 (12) =
288.

I don't know why you multiplied before you divided.

its multiplication first, then division. I believe subtraction draws the last straw.

 

[-DMP-]

See, I was taught that division and multiplication are ... equal so to speak, so you always go from left to right:

48 / 2 (9+3) =
48 / 2 (12) =
24 (12) =
288.

I don't know why you multiplied before you divided.

I looked at is 48/2*12 and both 2 and 12 are in the denominator and the fraction as a whole is 48/24.

As opposed to 48/2 as a fraction and 12 as a whole number multiplied by the whole thing.


-DMP-