Do pages 174176 # 115
Practise chanting to this song:
Thursday, January 28, 2010
Monday, January 18, 2010
Probability.
Today in math class we did :
If we had to flip a coing there is a 50% chance that we will get heads or tails. A way we can simplify that is
Questions:
What is the probability of rolling a 60 with a standard die
b) P(constanant) out of the bag
3:4 3 75%

4
There are 10 marbles 3 BLUE
1 GREEN
6 RED
a) p(red)
6 6:10 60%
10
P(red, blue , green)
 this is a certain event !
for your homework :
mountain are in a bag?
a PCN
B PC constanant
c letter
d Pc  number
If we had to flip a coing there is a 50% chance that we will get heads or tails. A way we can simplify that is
Questions:
What is the probability of rolling a 60 with a standard die
*P( ) means the probability of the thing inside the brackets happening
the letters s.n.o.w are placed in a bag
a) what is P(w) when drawing 2 letter?
1:4 25% 1

4
the letters s.n.o.w are placed in a bag
a) what is P(w) when drawing 2 letter?
1:4 25% 1

4
b) P(constanant) out of the bag
3:4 3 75%

4
There are 10 marbles 3 BLUE
1 GREEN
6 RED
a) p(red)
6 6:10 60%
10
P(red, blue , green)
 this is a certain event !
for your homework :
mountain are in a bag?
a PCN
B PC constanant
c letter
d Pc  number
Probability
Probability is the chance of an event happening.
Probability = favorable outcomes over possible outcomes.
It can be expressed as a ratio, a fraction, or a percent.
Outcome Is one possible result of a probability experiment.
Favorable outcomes Is a successful result of a probability experiment.
Check this out:
If you roll a die, the probability of you getting 1,2,3,4,5 or 6 is all the same.
They're all equal.
Brown
Orange
Orange
Red
Red
Red
Blue
Blue
Blue
The probability of getting each color is unequal
Monday, January 11, 2010
Numbers
Factor is a number that goes into a number exactly. With no decimals or remainders.
eg. 2 is a factor of 6
2 goes into 6 exactly 3 times
2 is not a factor of 5 because 2 goes into 5 2.5 times
Find the factors of 14, 4, 12, 16, 17, 24, 41, 96
141, 2, 7, 14
Why put it like that? The number is 14, 1 goes into 14 14 times and 2 goes into 14 7 times. That is also how you check if it's right or not.... (1 x 14 = 14, 2 x 7= 14)
4 1, 2, (2) 4
12 1, 2, 3, 4, 6, 12
16 1, 2, 4, 8, 16
17 1, 17
24 1, 2, 3, 4, 6, 8, 12, 24
41 1, 41
96 1, 2, 3, 4, 6, 8, 12, 24, 32, 48, 96
Prime Numbers are numbers with only 2 factors
These factors are 1 and itself
Composite Numbers are numbers with more than 2 factors
Determine whether each number is prime or composite
....1....................9..............13...........28..........31.......41...........51
....^.................. ^............. ^............^............^.........^.............^
neither composite .....prime composite prime prime composite
Multiple is the opposite of a factor
eg 10 is a multiple of 2
10 is a multiple of 5
The multiples of 4 are 8, 12, 16, 20, 24, 28, 32............
Lowest Common Multiple L.C.M.
the EG. to find the L.C.M. for 3 and 4
3 3, 6, 9, 12, 15, 18
44, 8, 12, 16, 20
The least common multiple is 12.
Homework!!
Find all of the factors of 10, 18, 37
Determine which numbers are prime or composite 2, 11, 17, 27
Find the L.C.M. of 2 and 4, 3 and 5, and 6 and 7
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