Math question

[Hard On Parts]

Hey, my daughter just asked me a math question and I am having trouble figuring it out.

Give it a shot:


Water boils at 212 degrees and freezes at 32 degrees. What is the halfway point between the boiling temperature and the freezing temperature?

 

[StageRulz]

122 Degrees

 

[Vic_E55_2001]

122F

 

[Hard On Parts]

Did you get it by subtracting 32 from 212, getting 180. Then dividing by 2 and finally adding back the 32 or did I do it wrong?

 

[Gunnybusa]

I came up with 90.

 

[Vic_E55_2001]

And that is NOT math question...

 

[Gunnybusa]

Why add back the 32?

 

[Vic_E55_2001]

Metric system is so more logical...

Water froze - 0 C
water boils -100 C
50C = 122F

 

[Gunnybusa]

Metric system is so more logical...

Water froze - 0 C
water boils -100 C
50C = 122F

+1

 

[Vic_E55_2001]

BTW... What grade Your girl in?

 

[Hard On Parts]

4th

 

[Vic_E55_2001]

Mathematically answer should be (212-32):2=90
Phisically 122F ... and that is not completelly correct answer..

I think this is a tricky question...

 

[shortBoarder]

Mathematically answer should be (212-32):2=90
Phisically 122F ... and that is not completelly correct answer..

nope; you've got to add 32 back into it. Since you're subtracting 32 from 212 then dividing, you're essentially just getting the midpoint (90) of the difference (180) of the two numbers, which isn't correct.

Try with a different set of numbers - the midpoint between 500 and 250:

500 - 250 = 250

250 / 2 = 125

125 + 250 = 375

 

[rubbersidedown]

138.

if you were on a stair case that had 212 steps...

and you were on step 32...

you'd have to climb to step 138 to be half way.


no?

 

[hemroid]

122

 

[cosmo]

nope; you've got to add 32 back into it. [/QUOTE]
Yup. Half the difference of 180 = 90 added to the start/low number of 32 or subtracted from the end/high number 212 = 122
Please tell me you guys don't work for H & R Block.



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[AZIROC]

Metric system is so more logical...

Water froze - 0 C
water boils -100 C
50C = 122F

+1

 

[billbell]

212-32=180
180/2=90
32+90=122
212-90=122
122 should be the correct answer??

 

[si-lo]

I figured halfway would be.........warm?

 

[Col_Mustard]

Too easy answer =









Look in the back of the math book at the answer key