Welcome!

Hello and welcome to the 2013-2014 school year! I'm excited to work with you this year! Please take some time to look over this site. I've left all of the posts from last school year up for you to have available during this school year. Maybe I taught a lesson better last year, so why get rid of it now!? :) If you have questions, please email me at kenneth.mach@k12northstar.org.

Thanks!
Mr. Mach

Tuesday, September 4, 2012

Adding and Subtracting Decimal #'s

Hey! You!! Always line up the decimal points!!!!

So those are the notes from today... no seriously. That was the main thing I was trying to stress in class today. In order to add and subtract decimal numbers, start by lining up the decimal points. Then, add or subtract like normal. 

I've put the answers to the homework below. If you'd like extra credit for this Friday's quiz, complete the following sentence at the bottom of your homework page when you turn it in tomorrow (1st and 2nd period) or Thursday (3rd and 4th periods):

My favorite number is _____________.

Answers:

1) .111
3) 26
5)3.29
7) 43.11
9) 342.72
11) 99.52
13) 88.893
15) 104.86
17) 3.381
19) 77.26
21) 16.154
23) 1.3
25) 4.43
27) 23.695
29) 33.08
31) 29.795
33) 722.884
35) 118.946
37) 74.76
39) 2



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