7-18: scribepost

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Thursday, June 16, 2011

Exam Review Part 4

Fraction- Out of any whole number

Decimal- Out of 1

Percent- Out of 100

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Practice:

Find 50% of 10 =
Find 77% of 17 =
Find 20% of 30 =
Find 40% of 25 =
Find 65% of 90 =

Still can't do it? Remember, when finding the percent of something, you turn it into a decimal then multiply the decimal by the number you wanted to find a fraction of. For example:

Number 2 states: Find 77% of 17

You then: 0.77 x 17 = 13.09 <------------ 77% turns into a decimal.

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Here is a helpful video:

Here are s0me helpful games:

GOOD LUCK ON THE EXAMS EVERYONE!! :)

*if there was no colour, again, my computer is messed up.

Wednesday, June 15, 2011

Integers

Negative numbers represent values below zero and positive numbers represent values above zero.

eg. above and below ground or sea level
1+(-2)= (-1) is an addition statement
3-(-1)=4 is a subtration statement

Opposite integers have the same numeral but different sign eg. 3 and (-3)

Know wat a (+)+(+)= (+)-(+)=
(-)+(-)= (-)-(-)=
(+)+(-)= (+)-(-)=
(-)+(+)= (-)-(+)=

practice with different numerals in each situation

Exam Review Part 3

Questions to Practice for Exams

Algebraic:
1) j + 7 = 9
2) c - 6 = 3
3) 2 = p - 5
4) 7 = 4 + n
5) 3f = 18
6) 12 = 4b
7) 5 = h/5
8) n/7 = 3
9) 2y + 4 = 14
10) 2y + 4 = 14

Integers:
1) (-6) + (+6) =
2) (-4) + 9 =
3) (+3) + (-2) =
4) (-4) + (-2) =
5) (+3) - (+9) =
6) (-5) - (-10) =
7) (-6) - (+7) =
8) (+4) - (-4) =
9) (+9) - (-1) =
10) (-17) - (-13) =

Adding and Subtracting Fractions:
1) 1/4 + 1/4 =
2) 1/4 + 2/3 =
3) 3/4 + 3/4 =
4) 4/5 + 6/7 =
5) 1/3 + 1/4 + 2/5 =
6) 2/5 + 3/7 =
7) 1/2 + 1/2 =
8) 2/3 + 1/5 =
9) 5/6 + 1/6 =
10) 2/3 + 3/4 + 5/6 =

Adding Mixed Numbers:
1) 1 1/3 + 1/3 =
2) 1 2/4 + 1 1/4 =
3) 1 2/5 + 2 1/5 =
4) 1 2/6 + 1 3/6 =
5) 2 5/8 + 2 4/8 =
6) 1 2/6 + 4/6 =
7) 3 1/8 + 5 5/8 =
8) 3/4 + 1 1/4 =
9) 3 2/5 + 1 4/5 =
10) 4 7/12 + 6 11/12 =

Here ya'll go :)
I hope you'll have fun figuring these questions out!
Have a great day everybody (: !
p.s - sorry if the letters go huge again, my computer is messed up.

Exam Review part 2

Tuesday, June 14, 2011

Review on Integers

Integers are positve and negative numbers, including zero.
For example : 1, 54, 8526, 4582328785, -543, -89641237, 0
Integers are not - decimals, fractions percents or ratios
Zero Pairs : a pair of integers representing +1 and -1
The pair represents zero because (+1)+(-1)=0
Here are some questions to help you ! :
Look at the diagrams and change it into an expression and answer it.

Now answer these regular expressions:

(+7)+(-4)=
(+10)-(-5)=
(-5)+(+9)=
(-8)-(+2)=

YOU CAN ALSO USE NUMBER LINES TO HELP YOU!

Questions- Exams Practice

Here are some things you need to be able to do for exams:

Bedmas-

3+4 x 5-1=

(6+7)x 2- 6=

(12 x 2)÷ 3+8=

8+ 4 x 6=

5+3 x 6- 2=

3 x 4 ÷ 6 - 2=

81÷ 9 +6 =

12+4-(6-2)=

Algebra-

a+10= 30

2n-7=5

3x+19=31

n/3= 4

5k=120

4n-5=15

7n=49

k/9-5=3

54-n = 20

w/5=20

Circles-

d? r=3

c? d=5

a? r=19

r? d=6

c? r= 55

a? d= 22

c? d=62

d? c=8

r? c=48

a? d=12

Working with Data- Find mean, median, mode, range and outliers

13, 3, 8, 9, 3

1, 8, 4, 0, 12, 6, 8

1, 5, 6, 19, 19, 23, 4

12, 45, 6, 4, 9, 10, 9

12, 4, 56, 76, 90, 1, 34, 12, 6

Converting Decimals, Fractions, Percents

1/4

0.75

30%

24%

5/8

0.9

0.78

25%

4/20

Integers

2 - (-4)=

3 + (-8)=

15 + 3=

40- 4=

(-6)- 4=

(-19)- (-5)=

(-23)+ (-10)=

(-18) + 9=

Exam Review

Here are the stuff you need to review:

Math- Exams Practice

Quiz

What is "Translation"

a mirror image

a slide along a straight line

turn around a fixed point

none of the above
What does "Bisect" mean?

to cut in two

to cut in three

to cut

none of the above
Larger than the actual number is.....?

over estimate

under estimate

big estimate

none of the above
Base x height is?

circle

triangle

parallelogram

square
Greatest to least..?

descending order

ascending order

none of the above
What's a terminating decimal?

a decimal goes on forever but the digits are different

a decimal goes on forever

a decimal in which the digits stop

none of the above
What is a zero pair?

pair of integers representing +1 and -1

pair of integers representing -2 and +2

pair of integers representing +15 and -10

none of the above
What's diameter?

distance around a circle

distance across a circle through it's centre

distance from the centre of a circle to the edge

none of the above
How do you find circumference?

2πr

2d

all of the above

none of the above
Answer to a division question...?

sum

product

difference

quotient
A number can be divided by another with no remainder or decimal.

divisibility

non- divisibility

none of the above

all of the above
A table used to show how numbers are the same and different

ratio table

venn diagram

table of values

carroll diagram
One possible result of a probability experiment...?

outcome

favourable outcome

random

none of the above
Is BEDMAS- brackets, exponents, division, multiplication, addition, subtraction

no

yes

maybe
What is another name for coordinate grid?

graph

quadrats

cartesian plane

none of the above
What is LCD and GCF?

lowest common denominator & greatest common factor

least common denominator & greatest common factor

least common divider & greatest common flies

none of the above
A table showing 2 sets of related numbers

table of values

carroll diagram

ratio table

none of the above
What is with the variable?

constant

numerical coefficient

operation

none of the above
What is mean?

the one in the middle of the data set

the one mostly seen in the data set

add all the numbers up and divide by how many numbers there are
What is range?

greatest and lowest number added together

the greatest and lowest numbers in an arranged data set (greatest number - lowest number)

last number in a data set

Another Quiz by QuizMaker

Exam Review Part 2

Converting fractions, decimals, and percents

The first image shows the before, and the bottom shows the after. When converting fractions decimals and percents, you multiply the fraction by the denominator and once you get your decimal, you multiply it by 100 to get your percent. Here is why:

Decimal: Out of 1

Percents: Out of 100

Here are some other examples:

1/2 = 0.5, 50%
0.75= 3/4, 75%
80%= 4/5, 0.8

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Probability:

Probability means the chance of something happenin

This is one of the ways we can figure out a question like : P: heads and rolling a 4 with a regular die. We can use a Probability Tree.

Factors are multiples of a given number. For example, the factors of 32 include:

1, 2 , 4, 8, 16, and 32.

( 1 x 32 = 32 )

( 2 x 16 = 32 )

(4 x 8 = 32 )

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You can also use a Venn Diagram to help you figure out 2 different sets of factors and common factors. To find the factors of 30 and 36, you do this:

Thanks for reading!

*Sorry if no colour appears, I don't know what happened.

Here is a helpful game.

Exam Review Part 1

Transformations- Moving a shape on the coordinate grid.

Translation- Slide along a straight line.

Rotation- Turn about a fixed point.

Reflection- Mirror image

*After making a transform

ation, you make a transformation image.

Do you remember what a coordinate grid looks like

e? A coordinate grid can also be called a Cartesian Plane.

(+,+) quadrant 1

(-,+) quadrant 2 *Remember x axis (horizontal) comes before y axis. (verticle)

(-,-) quadrant 3

(+,-) quadrant 5

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

B-brackets

E-exponents

D-division

M-multiplication

A-addition

S-subtraction

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Parallel Lines

Intersecting

Perpendicular Bisec

tor

Perpendicular

Angle Bisector: Cutting an angle into 2 equal parts.

What is the angle bisector of 52? (52/2 = 26)

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Area of a triangle is base x height di

vided by two.

Area of a parallelogram is just base x height.

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*Part 2 will be coming tomorrow.

Thanks for reading!

I put colours, but if it didn't show up, I don't know what happened.

Here is a helpful link to help you study for exams.

Mean, Median, Mode, Range, Outlier

Mean - add all the numbers in the data set and divide it by how much numbers there are in the data set

Median - The middle number in a data set

Mode - The number that shows up the most in a data set

Range - subtract the largest number by the smallest number in a data set

Outlier - a number that doesn't belong in the data set
eg. 12 13 14 15 16 91

A question

12 13 14 15 16 12 32

Find the Mean, Median, Mode, Range, Outlier

Friday, June 3, 2011

Algebra Notes

Equation-mathematical statement with two expressions that have the same value eg.
x + 2 = 3
y - 7 = (-4)
3a - 2 = a + 2
b = 4
Here's an example of an equation we had to model

Model: 8 times a number plus 4 is 12

Answer: 8n + 4 = 12

Here's an equation we got and we had to identify, the variable, the numerical coefficient, an the constant

5y - 6 = 19

Variable- Y
Numercial Coefficient- 5
Constant- 6

Opposite Opperations ( /- means divide)

+ , -
x , /
- , +
/ , x

Here are examples of how to solve an algebra equation

After you find out what the variable is re-write it again

Please comment

Saturday, April 30, 2011

Chapter 8 Test Corrections

Question 8: What is the formula for calculating pi?
A pi = radius/circumference B pi = 2 x radius
C pi = diameter/circumference D pi = circumference/diamter

The correct answer is D pi = circumference/diamter

Monday, April 4, 2011

Circles, Parts of a Circle.

Radius: distance from the center of the circle to the edge, represented by the variable (r).

Diameter: the distance across a circle through its center, represented by (d).

Relationship between Radius and Diameter: The radius is half of the diameter. The diameter is twice the radius.
Constructing Circles:
1. compass 2. trace a circle 3. string
** contruct a circle with a diameter of 8cm using any method** (What is the raduis?) answer: 4

Monday, January 24, 2011

What is the probability of getting purple?

Answer to Jennifer's Probability Question

Jennifer's Question:

Johnny picked out of a bag with 5 chocolate bars.He had to pick one chocolate bar.

He also had to spin a spinner to determine how many times he would have to take a bite out of the chocolate bar.

Show all the possible outcomes using a chart or table. What is the sample space?

My Answer to Jennifer's Question:

Sample Space:

(1,Small Aero),(1,Kit Kat),(1,Coffee Crisp),(1,Large Aero),(1,Rolo)

(2,Small Aero),(2,Kit Kat),(2,Coffee Crisp),(2,Large Aero),(2,Rolo)

(3,Small Aero),(3,Kit Kat),(3,Coffee Crisp),(3,Large Aero),(3,Rolo)

(4,Small Aero),(4,Kit Kat),(4,Coffee Crisp),(4,Large Aero),(4,Rolo)

Sunday, January 23, 2011

Answer to Cyerra's Question

My answer for Cyerra's question is...

1:7 14%

and

Probability Question

What is the probability of getting green?

I hope you get this right!

Answer to Gielh's Probability Question

His question is : There a 10 shoes in a basket. One is Blue , purple , yellow, green , black , red , orange , light blue , dark red , and brown. Shannon has to pick one pair of shoes above. What is the probability of him getting purple?

Answer: 1/10, 1:10, 10%