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Author Topic: Math: Trying to Help My Daughter w/ PSATs  (Read 4610 times)

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Re: Math: Trying to Help My Daughter w/ PSATs
« Reply #15 on: October 10, 2010, 06:35:05 PM »

Offline Redz

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Quote from: Neurotic Guy on October 10, 2010, 06:18:51 PM
Quote from: Redz on October 10, 2010, 05:57:37 PM
Quote from: pearljammer10 on October 10, 2010, 05:54:48 PM
Quote from: Redz on October 10, 2010, 03:59:18 PM
negative 5 minus negative 4 = -9

a negative x a negative =  positive

so -5 x -9 = 45

the "double negative" doesn't apply to subtraction like it does multiplication or division

Sorry, this my friend is not correct. negative 5 minus negative four with always equal negative one. There is a typo in the exam, unfortunately this happens a decent amount of the time.

yup

I stand corrected.  Boo me.

If it's any excuse I had a headache at the time.  ;)

still do, come to think of it


Hey -- no shame in making a math error.  Math makes my head hurt.
and I passed the Math portion of the General Curriculum teacher's exams on the first try!

This was a brain fart/memory mistake.

Anyhow

GO C's!
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Re: Math: Trying to Help My Daughter w/ PSATs
« Reply #16 on: October 10, 2010, 10:05:36 PM »

Offline pearljammer10

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Quote from: Neurotic Guy on October 10, 2010, 06:18:51 PM
Quote from: Redz on October 10, 2010, 05:57:37 PM
Quote from: pearljammer10 on October 10, 2010, 05:54:48 PM
Quote from: Redz on October 10, 2010, 03:59:18 PM
negative 5 minus negative 4 = -9

a negative x a negative =  positive

so -5 x -9 = 45

the "double negative" doesn't apply to subtraction like it does multiplication or division

Sorry, this my friend is not correct. negative 5 minus negative four with always equal negative one. There is a typo in the exam, unfortunately this happens a decent amount of the time.

yup

I stand corrected.  Boo me.

If it's any excuse I had a headache at the time.  ;)

still do, come to think of it


Hey -- no shame in making a math error.  Math makes my head hurt.

Im sure trying to figure out more math didnt help that headache either!
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