### Scribe Post October. 29, 2008

Wednesday, October 29, 2008
Today in class Mr.Harbeck took a nap. He gave use two questions to do. Both questions were adding and subtracting integers.
(+2)-(+6)+(-2)=
He made use go up to the board by ourselves and show how we got the answer. We got a few ways.
(+2)+(-6)
(-4) +(-2)=(-6)

(+2)+(-6)+(-2)=(-6)

(+2)+(-6)+(-2)
[(-6)+(-2)]+(+2)
(-8)+(+2)=(-6)

Mr.Harbeck then gave us our HOME WORK! We had to do page 48 numbers 21, 22, 23, 27, 29, 30,37, 38, 39, and 40. Also e have to do page 49 numbers 9,10,11,14,15,25, and 26. I am going to show you page 49 numbers 9,10,11,14, 15, 25, and 26.

I will solve all these questions by changing the subtraction to addition and changing that integer to its zero pair, like if you have (-8)-(-10), you would change the subtraction to addition (-8)+(-10), then you change the integer to it's zero pair (-8)+(+10). You already know how to add integers so all you have to do is get the answer (-8)+(+10)=(+2).

9. (-6)-(+5)+(-3)
(-6)+(-5)+(-3)=(-14)

10. (-8)-(+5)+(-3)
(-8)+(-5)+(-3)=(-16)

11. (+8)+(-5)-(-3)
(+8)+(-5)+(+3)=(-6)

14. (+8)-(-5)+(-9)
(+8)+(+5)+(-9)=(+4)

15. (+15)+(-6)-(-7)
(+15)+(-6)+(+7)=(+16)

For 25 and 26 it's different then the others because it has 4 integers instead of three, but you can still do it the same way.

25. (+16)+(-9)+(-3)-(-5)
(+16)+(-9)+(-3)+(+5)=(+9)

26. (+18)-(-5)+(+3)-(-9)
(+18)+(+5)+(+3)+(+9)=(+35)

I hope it helped :)