Homework

Homework package due Monday Feb.8th

1) pg 190-193
2)pg 180-182 #1-11
3)pg 174-176 #1-15
4)pg 168-170 all
5 ) pg 163-169 all

6)












7)A) Trudy, Shana, Saira, Kendra and Tracy are on basketball team A. Jordan, Micheal, Terrance, Sean and Suni are on Team B. Use a Tree Diagram to show all the possible outcomes if the coach assigns each person on Team B to defend against a player on Team A.
B) Write the Sample Space

8)A toonie is flipped and a four-sided die is rolled. Using a chart find P(Tails and Odd Number).

9) Create and answer a Probability question with the results of 0%, 20%, 60%, 100%.

10) A jar contains 4 pink, 26 purple and 9 orange marbles. The marbles are drawn at random. What are the chances you get 2 pink marbles without replacing the first marble.

11)
1)F
2)R
3)F
4)F
5)F
6)F
7)F
8)F
9)F
10)F
11)T

January 28th 2010

Do pages 174-176 # 1-15

Practise chanting to this song:

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

*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

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

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

14-1, 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

4-4, 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

Todays Math Class

In todays math class we found the are of G C I F

C, D, I, E = 25m

I, F, E = 12.5m squared

A, H, B = 40m squared

B, C, H, G = 70m squared

C, G, F, I, = 52.5m squared

The area of the Rectangle is 200m squared

Percent

30% means 30 out of 100

Percent is a fraction out of 100 or a denominator of 100

____

100

eg. 30% = 30 = 0.30

___

100

We can use money skills to think of fraction decimal percent

something something something

_______ ________ ________

something 1 100

25 50 10

____ ____ ___

100 100 100

(25%) (50%) (10%)

Find 50 % of $84.60 = $42.30

Find 25% of $84.60 = $21.23

Find 10% of $92.30 = $ 9.23

Find 50% of $45.80 = $22.90

Find 25% of $ 50.00 = $ 12.50

Find 10% of $72.40 = $7.24

Using a ratio table find 37.5% of 120

HOMEWORK

Using the ratio table find:

75% of 16

60% of 90

40% of 80

The Half and Differences between Numbers

The whole numbers that are between 7 and 13 are 8, 9, 10, 11 and 12.
The difference between 13 and 7 is 6.
13 - 7 = 6
Half of this difference is 3.
6 divided by 2 equals 3.
The number 10 is halfway between 7 and 13.
Like this:
7 + 3 = 10 Or...
13 - 3 = 10

Finding a halfway between numbers.

You can add the given numbers and divide it by two.
Like this..
70 and 170
70 + 170 = 240
And divide it by two. It equals 120.

And:

If you don't get it still, look at these examples we did during class...

1. What are the whole numbers between these given numbers?
68 and 72: The answer would be 69, 70, 71.
108.3 and 111.6: The answer would be 109 and 110

How? If you think of it as the alphabet, like, A B C, you know that
B is in between A and C.

I hope this website helps:
http://pcimt.blogspot.com/2008/01/halfway-numbers.html