7-18: June 2011

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

Convert Fractions, Decimals and Percents

2/4 = 50% or 0.5

75%= 3/4 or 0.75

0.6= 60% or 3/5

Solve algebraic equations

a+6=7 b-5=3 2=s-6
a+6-6=7-6 b-5+5=3+5 2+6=6-6+6
a=1 b=8 7=6

7=5+d 3g/3=18/3 12/4=4k/4
7-5=5-5+d g=6 3=k
4=d

Exam Review Part 3

Radius - distance from the center of a circle to the edge, represented by the variable "r".

Diameter - The distance from across a circle through it's center. Represented by "d".

Relationship between radius and diameter? The radius is half of the diameter and the diameter is twice the radius.

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Constructing Circles:

compass
trace a circle
string

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Practice:

Diameter if radius is 6 : 12
Radius if diameter is 9: 4.5

Now try these:

-What is the radius id diameter equals 10?

-If you multiply your diameter from the first question and divide by 2, what would the radius make?

-What if the radius was 3 and you doubled, what would be the diameter?

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- the ratio of the circumference of a circle to it's d

iameter.

- approximate value is 3.14

- pi = c/d

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Formulas:

d = 2r 2r = d r = d/2 d/2 = r

(pi) d = c c/(pi) = d c = (pi) d

2 (pi) r = c c/(pi) = 2r c = 2(pi) r

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Thanks for reading!

If there was no colour, it's because my computer is messed up.

Bye! GOOD LUCK AT MATH EXAMS!

Exam review

COORDINATE GRID

SORTA!!!

Integers

Answer these on you own and you

will be fine :D

(-4) + (+3) =

(-3) + (+4) =

(-5)+ (+3)=

(+3)- (-8)=

(+5) - (-7) =

Bye:D comment please.

Integers

[-9]+[+2]=-7
[+3]-[+2]=1
[-5]+[+6]=1
[-2]-[+2]=0
[+5]+[+5]=10
[+7]-[-3]=10
[-1]+[+5]=4
[0]-[-6]=6
[+4]+[-6]=-2
[-8]-[+10]=-18
(-2)+(+5)=3

Math Questions

a + 6 = 8                                  b - 5 = 2                      2 = s - 5

8 = 5 + d 4g = 19    13 = 5k

6 = k    z = 4    3n + 5 = 15
   6                                      8

Algebra Questions!

Have fun answering these! :)

x-10=3

x+5=10

t-2=6

11= r+4

-9= 2+9

-3+x=7

x+2=4

6-y= 9

3x=9

7x-5=10

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

( +, +) Quadrant l
(-,+) Quadrant ll
(-,-) Quadrant lll
(+,-) Quadrant lV

( x-axis always comes first)

Transformations- Moving a shape on a coordret grid
Translation- Slide along a straight line
Rotation- Turn about a fixed point
Reflection- Mirror image

1/2 = o.5 , 50 %

0.75=3/4, 70%

80%= 4/5, 0.8

Mode- The most used number in a data set.
Median- Middle number
Mean- Add up all the numbers and divied it by how many numbers there are in the data set.
Range- Biggest take away the smallest
Outlier- The number that dose not fit in the data set.

BEDMAS !

Just a reminder to what BEDMAS is.

B-BRACKETS

E-EXPONENTS

D-DIVISON

M-MULTIPLICATION

A-ADDITION

S-SUBTRACTION !

You have to remember that! It is very important! Don't forget that 1+ and 1- makes a zero pair.

To see if you understand BEDMAS, here are some questions!

9 - 6 + 7 + 2 × 10

6 × 4 + 8 + 4 - 3

9 + 11 × 7 + 11 - 4

5 - 2 + 9 × 4 + 5

7 × 6 + 1 - 1 + 6.

Good luck, and have fun!

Exam Review Part 3

Don't forget to study this!

Transformations- called an image after it transforms.
Translation- slides along a straight line
Rotation- turns about a fixed point
Reflection- mirror image
Don't forget to remember the quadrants and how to plot points on a coordinate grid/cartesian plane!

X-axis- horizontal line
Y-axis- vertical line

That's it. Good luck in the Math Exams 7-18!

Math Questions

Math questions

2+a=6

3+a=9

7+a=8

9+a=15

14+a=17

24+a=32

13+a= 15

12-a=6

16-a=9

24-a=5

18-a=10

2n+5=15

71-a=44

13-a=2

66-a=57

98-a=12

76-a=31

31-a=18

Math Exam Review

Divisible- means when a number can be divided by another number, with no remainder or decimal

It is a whole number

Divisibility Rules

0- end in zero
1- all numbers
2- even numbers
3- sum of the digits is 3
4- divisible by 2 twice
5- ends in a 0 or 5
6- divisible by 2 and 3
8- divisible by 2 thrice
9- sum of the digits is 9
10- ends in 0

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

Mean Median Mode

I thought this song was pretty catchy. Thanks Mr Isfeld for showing us this video, it will help us on the exams! HAHA (:
This Video are for those people who still don't understand mean, median, and mode. This Video will help you on the exams!

There isn't Range and Outlier in that video, so i'll give it to you in case you guys .. lost your notes.
Range: The positive difference between the largest and smallest values in a data set.
example: Range of - 4,8,5,6,9,1,3,5,8,6 arrange it 1,3,4,5,5,6,6,8,8,9 9 is the biggest number and 1 is the smallest. So 9-1=8 Range is 8!
Outlier: A value that is much larger or smaller than the other data value. The data set may have more than 1 outlier or 0 outliers.
Outliers for- 1,67,68,67,64,65,100 are 1 and 100.
Find mean,median,mode,range,and outliers.
18,19,79,17,18,2
14,14,16,3,65,17
98,202,99,91,2,87,45,88,100
I'm not answering it for you this time ;).

Well Goodnight, hope this post will help you on exam days!

PLEASE TRY TO ANSWER THE QUESTION I PUT ON MY POST IT WILL HELP A LOT HERE IS SOME VIDEO TO HELP YOU

EXAM !!!!!!!
REVIEW QUESTIONS :)

ADDING SUBTRACTING DECIMAL QUESTIONS
1 36.16 + 22.59
2 0.77 – 0.67
3 0.71 + 0.58
4 86.62 – 45.61
5 0.52 – 0.03
6 6.5 + 3.8
7 0.27 – 0.07
8 0.26 + 0.98
9 77.4 – 56.5
10 54.798 + 0.2638

CHANGE FRACTION INTO DECIMAL AND PERCENT

1) 1/2=
2) 5/8=
3)1/9=
4) 3/4=
5) 4/5=
6) 3/6=
7) 1/3=
8) 8/9=
9) 6/10=
10) 3/2=

PROBABILITY GAME EXERCISE and websites

1) PROBABILITY 1
2 PROBABILITY 2
3) PROBABILITY 3
4)PROBABILITY 4
5)PROBABILITY5

adding fractions

videos you can watch to help you

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=

Oppisite integers

Numbers like (-7) are numbers below zero. Which are also known as Negative Integers. Positive Integers are opposite of negative integers they both have the same numeral but different sign like 5 / -5. Opposite integers are not the same .

(+) + (+) =

(-) + (-) =

(+) + (-)=

(-)+(+) =

These represent addition statements

(+)-(+)=

(-)-(-)=

(+)-(-)=

(-)-(+)=

These represent subtraction statements.

This is a number line. it is showed to represent integer statements

Algebra Questions

Having Trouble with Algebra questions? Well, you came to the right place! I will give you some algebra questions that you can solve. This can help you on the exam.

Before that, I will give you some words to study in case Mr Isfeld asks you what this word means on the Exams.

Variable: A letter that represents an unknown number
For example x,a,n it could be any letter.

Expression: Any single number or variable or combination of operations (+,-,x,/ <-- division) involving numbers and variables.
For example 5,r,8t,x+9, 2y-7.

Value: A known or calculated amount.

Constant: A Number that does not change-increases or decreases the value of an expression.

Numerical Coefficient: A number that multiplies a variable.
Example: 4c+2

Equation: Mathematical Statement with two expressions that have the same value.
Example: x+2=3, y-7+(-4), 3a-2=a+2, b=4

Linear Relation: A pattern made by 2 sets of numbers that results in points along a straight line on a coordinate grid. Example:

Graph: A Visual way to show how two sets of numbers relate to each other. For example:

I might have missed a word. Comment if I did!
Well, On to your questions!

Question 1: a+1=3, What is a? Remember to check your answer.

Question 2: 4c-3=17, What is c? Check your answer!

Question 3: B-2=5, What is B? Check your answer!

Question 4: 2j+1=9, What is J? Check your answer!

Question 5: w/3=6, What is W? (The dash means divided by) Check your answer!

Question 6: f/3-2=1, What is F? Check your answer!

Question 7: 3a-1=23, What is a? Check your answer!

Question 8: f-3=6, What is F? Check your answer!

Question 9: 16(+)x=21, What is x? Check your answer!

Question 10: 21=4+p, What is P? Check your answer!

If you need to check if you are right, you can scroll down to look for how you do it and the answers. Do not cheat and scroll down to look for the answers right away, try your best and think hard first!

Scrolling?

Still Scrolling?

CHEATER! haha, just kidding :)

Answer for Question 1:
A+1=3, yeah, It's an easy question, you guys should have got this right. Here's how you do it! A+1-1=3-1 Whatever you do to the left, you have to do it to the right!
3-1=2, a=2
Check your answer! (re write the question) a+1=3, 2+1=3, 3=3! If you have this, then you are correct!

Answer for Question 2:
4c-3=17, Reverse order of operations: 4c-3+3=17+3
17+3=20
4c/4=20/4
20/4=5
C=5
Check your answer! 4c-3=17, 4(5)-3=17, 17=17.

Answer for Question 3:
B-2=5
B-2+2=5+2
5+2=7
B=7
Check your answer! B-2=5, 7-2=5, 5=5!

Answer for Question 4:
2j+1=9
2j+1-1=9-1
2j/2=8/2
8/2=4
Check your answer! 2j+1=9, 2(4)+1=9, 9=9!

Answer for Question 5:
W/3=6
3 x w/3 =6x3
W=18
Check your answer! W/3=6, 18/3=6, 6=6!

Answer for Question 6:
F/3-2=1
f/3-2+2=1+2
f/3=3x3
f=9
Check your answer! F/3-2=1, 9/3-2=1, 3-2=1, 1=1!

Answer for Question 7:
3a-1=23
3a-1+1=23+1
a/3 = 24/3
a=8
Check your answer! 3a-1=23, 3(8)-1=23, 23=23!

Answer for Question 8:
F-3=6
F-3+3=6+3
F=9
Check your answer! F-3=6, 9-3=6, 6=6!

Answer for Question 9:
16(+)x=21
+16-16(+)x=21=16
x=5
Check your answer! 16(+)x=21, 16+5=21,21=21!

Answer for Question 10:

21=4+p
21-4=+4-4+p
21-4=17
17=p
Check your answer! 21=4+p, 21=4+17, 21=21!

And there you have it!
This actually took me the whole night, I don't know why but I did it all for you guys!(:
I hope this helps you for the exam, sorry if it's too long.. I tried my best!

Here is also a video you can watch to understand more about solving equations if you still don't get it. http://youtu.be/W7fPsSw74TM

Ok, Have a good day! (:

Exam Review part 2

Angle bisector

If the angle is 52˚ and gets bisected what are the measures of the two new angles.

Area of a triangle

Area of a parallelogram

Adding,subtracting,multiplying and dividing decimal numbers using a calculator.

54.65+76.8=131.45

56.12+45.6+32.45=134.17

67.89+45.76+87.43=201.08

Exam Review

Here are the stuff you need to review:

Notes and Equations

Variable - a unknown Number

1.) a + 6 = 10
2.) b - 8 = 5
3.) 7 = 3 + d
4.) 5g = 15
5.) 5 = s - 5
6.) 35 = 7k

Integers
Negative number 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 - (-4) = is a subtraction statement

Divisibility and factors

Divisibility rules

0-ends in zero

1-all numbers

2-even numbers

3-sum of the digits is 3

4-divisible by 2 twice

5-ends in a 0 or 5

6-divisible by 2 and 3

8-divisible by 2 thrice

9-sum of the digits is 9

10-ends in a zero

Divisible - Means when a number can be divided by another number, with no remainder or decimal.

Factors

Don't no a definition :'(

Example:

1,2,4,8,16,32

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 Notes

Transformations
Translation - slide along a straight line
Rotation - Turn about a fixed point
Reflection - Mirror image

(+,+) Quadrant I
(-,+) Quadrant II
(-,-) Quadrant III
(+,-) Quadrant IV

Experimental Probability - Actually doing the trial
Theoretical Probability - What you expect to happen

Divisible - Means when a number can be divided by another number with no remainder or decimal. A Whole Number

Divisibility Rules
0 - End in zero
1 - all numbers
2 - all even numbers
3 - sum of the digits is 3
4 - divisible by two twice
5 - ends in a zero or a five
6 - divisible by 2 and 3
8 - divisible by 2 quad
9 - sum of the digits is 9
10 - ends in zero

Circle Formulas
c = π d
A = π r²
c = d = 2r
c = 2 π r

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: