Pre-Algebra Hexagons Class 09/10: November 2009

Monday, November 30, 2009

Quia Notes :]

To get on to Quia you go to Edline.www.reading.k12.ma.us and sign in,next you go to classes and shortcuts. Then go to Pre algebra hexagons. Under links you will find the link that says "Quia." It will bring you right to the games if you click on it. The first game link is a Java games and there are many games under that link there are matching flashcards and concentration, Be sure to know the category's each game is under! There's a variety of games and this is a good way to study in a fun way.

One fun game is Rags to Riches. Its similar to who wants to be a million air. When you get one question wrong you start over so its a good idea to write all the correct answers on a sheet so when you come back to it you know its right and you can "win" 1 million dollars. Another game is the challenge board. This is similar to Jeopardy. You can play 2 player or single player. You type in your names then you click on number of points you want under the category you want and see which player can get more points.

Another really fun game is concentration. Concentration and matching are very similar. You have to know the question and answer then you have to try to math it with the least amount of trys as possible. This isn't a game where you should click around try to write down the problems and the answer so if you find the answer on the game board you can find the match.

Another important thing Quia helps with is adding and subtracting positive and negative numbers. You have to remember if the greater number in the problem is positive the answer is positive. If the greater number is negative the answer is going to be a negative number.

*Tonight's homework is the order of operations sheet. Due tomorrow.*
Quia is a good study source.

Also on Quia it helps you review order of operations. PEMDAS.
P=parenthesis
E=exponents
M=multiply
D=divide
A=adding
S=subtraction
Please enjoy Mickey OR Donald acting OR singing

Wednesday, November 18, 2009

Review for Tuesday

*If a negative sign is NOT in parenthesis the answer is ALWAYS negative

a problem -x4 (4 is a power)
^
-34 (4 is a power) 2(3+4)2 (2 is a power)
-3*3*3*3 ^
^ 2*72 (2 is a power)
-9*3*3 ^
^ 2*49 (7*7=49)
-27*3 ^
^ 98
-81

*odd powers are negative *evens powers are positive
*remember P(please)(parenthesis)
E (enjoy)(exponents)
M(mickey)(times) or D(donald)(divide)
A(acting)(add)or S(singing)(subtract)

Order of Operations with exponents

More practice with negative numbers and order of operations.

Order Of Operations With Exponents

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Tuesday, November 17, 2009

Order of Operations with exponents

Here are our notes from today.

Ch. 4.2 Hexagons

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Monday, November 16, 2009

Divisibility and Exponents

Divistibility Rules~
by 2- its ends in 0,2,4,6,8 for example, 84 is divisible by 2
by 3- if the sum of its digits is divisible by 3 for example, 9/3=3
by 4- if the last 2 digits are divisible by 4 for example,128 7*4=28
by 5- if it ends in 0, or 5 for example, 20 or 25
by 9- if the sum of its digits is divisible by 9 for example, 72/8=9
by 10- if the number ends in a 0 for an example 30

Factors~
10-1,2,5,10
21-1,3,7,21
24-1,2,3,4,6,8,12,24
31-1,31 -this is a prime number
A prime number is 1 and the number itself

Exponents~
Exponents can be used to show repeated multiplacation
3^7=3*3*3*3*3*3*3 3= base 7=exponent
-a power has two parts
-a base has an exponent
-the expression 3^2 is read "three to the second power
(-4)(-4)=8^2