### jan. 31 ; scribbing`

Tuesday's scribe is now dhona.

*Math*: January 31st, 2006 Period 2What we learned in today's class were how to deal with

**2 integers in a set of brackets**. We did examples that helped us fully understand the concept. Adding and subtracting integers is simple, you only have

**3 rules**to follow. They are:

**1.)**Order of Operations, only 1 integer per set of brackets.

**2.)**After you have cleaned up the brackets pull down the free floating sign

**3.)**Change your -(-) or owe owes,

**Example:**

1.) ( - 9 - 3 ) -15

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2.) -12 -15= - 27

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In step two you just do what you normally do with integers, -9 ( owe 9) -3 (owe 3) Together you owe -12. Then you bring down the free floating sign and the number in this case, 15. You must write the answer on the second line. If you put it on the first line, it wouldn't be correct. You now have owe 12 and owe 15, together you owe 27. There is also another set of brackets that we used. They are [ ]. That means that all the number in that one has to be done even if they have a million brackets in it.

**Example:**

1.) [ ( - 4 ) + ( - 2 ) ] - (- 3)

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2.) -6 + 3 = -3

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Here we have [ ] and ( ). All you have to do is the operation inside the square brackets. That would be

**owe 4 owe 2= owe 6.**Since the 3 is an -(-) you change that to a + sign and bring it down. Now bring the 3, your equation reads

**- 6 + 3 = - 3.**

This concept is simple to understand after you get used to it. At first it can be very tricky. This is just like order of operations that we did in grade seven. It is now just with integers.

**is half of the questions on the 4th page in the pun book, both sections and finish all the question in part two, the first page of book b. Then, the second page, questions 1-10.**

*Homework*Tomorrow's scribe is Yvanne cause I took over for her today.