double checking math problems.

label Mathematics
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schedule 1 Day
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i need to double check problems 1 - 3

May 12th, 2015

1-3= -2   3 is the bigger number so take its sign

ask me if you do not understand why

May 12th, 2015

sry i forgot to post picture

May 12th, 2015
photo_on_5_12_15_at_10.33_am__2.jpg

sry i forgot to post picture

May 12th, 2015

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May 12th, 2015
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May 12th, 2015
Oct 19th, 2017
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