## Tuesday, November 9, 2010

### Krystal`s Scribe for November 9th 2010.

SUUUP. I got picked to do the scribe today :)

In class, we basically just took notes about "Things You Need To Know". Here are the notes.

Signs,signs,everywhere. Signs....
-In mathematics we follow a certain order to be able to get the same answer. Order is usually devoted by certain symbols that help us get to the same answer all over the world. BEDMAS.
B=brackets= [ ] , { }, ( ).
E=exponents
D=division (multiplication)
M=multiplication (division)

Sometimes it`s PEDMAS. P= Paranthesis.

-3.6-2.8-2=
-3.6-(2.8-2.1)=4.3 <---BEDMAS Other Confusing Signs: -When brackets kiss. () ( ), it means to multiply. -A bracket around an integer or any rational number does not necessarily mean, "do me first"
(-3)=6.7=
6x7 6.7. A dot between numbers can also mean multiplication or a decimal, it depends on the dots position.
6.7=multiply 6.7=decimal <--Fail, sorry I didn`t know how to do the thing.

When is a Negative Number, Negative ?

12-(-4/5)=17 4/5
6-[-(-3/-4)]= 6 4/3 = 7 1/3
12(-4/-5)=11 1/5

1=(-1)(-1)(-1)(-1)
-1=(-1)(-1)(-1)(-1)(-1)

All or Some ?
2.3 squared = 36 or 18 ? Answer:18 = 2.(3.3) 9.2=18

(2.3)squared = 6 squared = 6.6= 36
-1/4 + (2/3)= ).43 < decimals or fractions ?

FOR HOMEWORK MAKE SURE YOU FINISH 2.3 AND 2.4 FOR MONDAY !!!!!

next i pick... uhh Faye I guess.