Emma's Scribe Post - 9/2/10

Today in class we started to go over Section 1.2.
We studied for about five minutes and then we had our second benchmark quiz.
We talked about the different ways to add and subtract negative numbers.
Positive amounts or adding on a number line moves you in right/positive direction.
Negative amounts or subtracting moves you to the left.
Ex. Adding two negative numbers:
-12 + (-8) = 
-(12+8) = 
-(20) =
-20
Ex. 2 Adding numbers with different signs:
-17 + 11 =
| -17 | - |11| =
17 - 11 =
-6
Subtraction:
a - b = a + (-b)
[Subtrahend] <- what does that mean?

JoJo put two rings in front of Amelia, then took one away and said that he was adding one to his negative account. So taking away one from her positive account.
I thought that that was an interesting take on subtracting.
Over all, today was a good day in math.


The next scribe will be William!
^_^ Emma
Don't forget to do your homework!