Monday, October 4, 2010

Michael's math profile.

Hey, I'm Michael, and I am a grade 8 math student . If someone asked me if I like math, I would say 'kind of' because sometimes it's easy for me to learn, but at the same time hard to understand. The thing I liked the most in math class, was doing the spinners for circle graphs, and we would all guess which colour it was going to land on !

Last year in grade 7, my favourite unit we studied, was fractions, because it was really easy, and we learned how to add and subtract them. I did well in this unit because, it was very easy for me to understand what was going on, and what was going to come next. The unit I had a hard time was converting the decimals, because sometimes I would get confused.

This year, in grade 8 math, I will become successful, by studying hard and finishing all my homework and getting good grades on tests. I would like to learn more about algebra, and anything else that's new to us and become a better and smarter student for all units.

My favourite blog I did last year, was the one I first did, because it was the day we first learned how to blog and I think I improved throught the year. Blogging helped me a lot because we gave and got feedback from our classmates saying what we can do better next time. I want to do more blogging this year, and just have fun !

Thursday, June 17, 2010

Homework Package

1. pg. 449. - 451 #3-16
2. pg. 444. - 445 #1-8
3. pg. 426. - 427 #1-17
4. pg. 405. - 407 #1.21
5. pg. 327. - 329 #1-21
6. pg. 329. - 322 #1-23
7. pg. 313. - 315 #1-20
8. pg. 270. - 272 #1-15
9. pg. 249. - 251 #1-5
10. pg. 220. - 221 #1-14



Finish !!


Define the words !

Perpindicular: Lines that intersect at a right angle.
Parallel: Two lines that will never cross or meet.
Intersecting: When two lines meet.
Perpendicular Bisector: A line that divides a line segment in half and has right angles to it.
Angle Bisector: A line that divides an angle into two equal parts.
Acute Angle: An angle that is less than 90 degrees.
Right Angle: An angle that is at 90 degrees.

Please finish the homework package & study for you're exams!

Wednesday, June 16, 2010

Definitions for math,

Mean - Add them all up and divide by how many Numbers are there

Median - The middle number of the arranged data set.

Mode- Number that is repeated the most

Outlier- Much smaller or larger than the others or the one that stands out the most

Variable - A letter that represents an unknown number

Translation- A slide across a line

Rotation- A turn about a fixed point called the center of rotation

Reflection - A mirror image



REMINDER
Every one must make a post for term 3
you also need to comment on all the blogs since April
And don't forget your home work package :)

Tuesday, June 15, 2010

Variables, Expressions, and Equations

Exam Review

This is the video for my scribe post.

Math Exam Review

Mean- Add them all up and divide by how many Numbers are there
Median- The middle number or take both numbers and divied them bye 2
Mode- Number that is repeated the most
Range- Largest - smallest =
Outlier- Much smaller or larger than the others or the one that stands out the most
Variable- A letter that represents an unknown number
Expression- Any single number, variable, combination and a operation involving numbers
Equation- A mathematical statement with 2 equal expressions that involve the same value

Exam Review

Exam Review

Define:


Variable - A letter that represents an unknown number.
Expression - Any single number or variable, or a combination of operations involving numbers and variables.
Equation - A mathmatical statment with two expressions that have the same value.

Eg. Variable a,b,c
Eg. Expression 2,x,2x+1
Eg. Equation 1+1=2, 2x=4 , 2+3=4+1


Find and describe the pattern. ID the next 3 terms.
64,58,52,46,40,34,28
Subtract 6 each time




Is this linear equation x=2y?
False backwards, should be y=2x


y=3x
Should be y=2x+1


Define:


Mean -The sum of a set of values divided by the number of values in a set.
Median - The middle number in a set of data after the data have arranged in order.
Mode - The most frequently occuring number. It can be used more than one.
Range -The difference between the large and small values in a set.
Outlier - A value that is much smaller or larger than the actual answer.


Find the mean,median,mode,range,and outlier.
75,70,81,77,73,75,80,79,73,17
Mean - 70
Median -75
Mode -73,75
Range -64
Outlier -17












Exam Review







Term 3 Homework Package :

1. pg. 449. - 451 #3-16
2. pg. 444. - 445 #1-8
3. pg. 426. - 427 #1-17
4. pg. 405. - 407 #1.21
5. pg. 327. - 329 #1-21
6. pg. 329. - 322 #1-23
7. pg. 313. - 315 #1-20
8. pg. 270. - 272 #1-15
9. pg. 249. - 251 #1-5
10. pg. 220. - 221 #1-14
FINISH THE HOMEWORK PACKAGE.
Define :
Perpendicular: Describes lines that intersect at right angle.
Parallel: Two lines the never cross or meet.
Interesting: When two lines meet.
Perpendicular Bisector: A line the divides a line segment in half and is at right angles to it.
Angle Bisector: A line that divides an angle into two equal parts.
Acute Angle: An angle that is less than 90 degrees.
Obtuse Angle: An angle that is greater than 90 degrees.
Right Angle: An angle that is at 90 degrees.
STUDY FOR:
1.Language Arts
2.Social Studies
3.French
4.Science
5.Math
Mr. Isfeld will deduct marks if you do NOT comment at least to 10 blogs and you have to make a blog for term 3!

Thursday, June 10, 2010

Exam Review: Integers

  1. 7+3=10
  2. 8-5=3
  3. 2+4=6
  4. 3-9=(-6)
  5. 7+(-3)=4
  6. 8-(-5)=13
  7. 2+(-4)=(-2)
  8. 3-(-4)=12
  9. (-7)=3=(-4)
  10. (-8)-5=13
  11. (-2)+4=2
  12. (-3)-9=12
  13. (-2)+-(-4)=(-6)
  14. (-8)-(-5)=(-3)
  15. (-7)+(-3)=(-10)
  16. (-3)-(-9)=6

Use integers to discribe the main floor, the basement, and the third floor.

(-1, o, 2)

Give each an example for:

opposite integer- (+1, -1)

zero pair- (+1)~(-1)

addition statement- (-3)+2=1

subtraction statement- (-3)-2=(-5)

Give an example for each:

(+)+(-)=(+)

(+)+(-)=(-)

(+)-(-)=(+)

(+)-(-)=(-)

~Sorry that I didn't put any pictures of the integer chips, I was in a rush and I thought it would take to much time to do them all~

Wednesday, June 9, 2010

Exam Review Study Notes (June 9' 10)

Add Video
300 ugly kids were asked what is their favourite colour. How many like blue, how many like green, and how many like gold.

Blue:
25/100 = 75/100 or 25% of 300
(x3)
0.25 x 300 = 75

Green:

30/100 = 90/100 or 30% of 300
(x3)
0.3 x 300 = 75


Gold:

45/100 = 135/100 or 45% of 300
(x3)
0.45 x 300 = 135



What is the estimated ratio of the circumference to diameter.
3.14 : 1


Find the circumference when radius is 6cm.
2r = d c=2Лr
2(6) = d c = 2 (3.14) (6)
12 = d or c = 6.2816
c = Л d c = 37.68cm c = 3.14 (12) c = 37.68 cm


Find area when diameter is 1om.
r = d/2
r = 10/2

r = 5m

a = Л r 2
a = 3.14 x 5²
a = 3.14 x 25
a = 705 m²

The measure of a sector is 20% of the data.
What is the central angle for this sector?
20% of 360°
0.2 x 360° = 72°

The central angle 198° what percentage the circle represents?

(divide)
316 198/360 = 55/100

(─316)

I have a pool with a radius of 6m.
My yard is 30m long by 15m, how much space do I have left in my yard?

A yard L x W
= 15 x
= 450 m²
A pool = Л r²
= 3.14 (6)
= 3.14(36)
30 m
= 113.04 m²
450 - 113161 = 336.96m²






STUDY FOR YOU EXAMS!!

Sunday, June 6, 2010

Exam Review Study Notes

Term 3 Homework Package
Pages:
1. 449-451 #3-16
2. 444-445 #1-8
3. 426-427 #1-17
4. 405-407 #1-21
5. 327-329 #1-21
6. 319-322 #1-23
7. 313-315 #1-20
8. 270-272 #1-15
9. 249-251 #1-3
10. 220-221 #1-14

Remember, this is due Monday, June 7, 2010!
If you lost your work that you did or never in the first place, you have to do it again.
Make sure you comment on all the blogs even the old ones.
Make sure you do a blog.

Define
Perpendicular- Describes lines that intersect at right angles. (90 degrees)
Parrellel- Describes lines the same place that never cross or intersect.
Intersecting- lines that cross at any angle.
Perpendicular bisector- a line that divides a line segment in half and is at right angles to it.
Angle bisector- the line that divides an angle into two equal parts.
Obtuse angle- angle greater than 90%.
Formula area of triangle-bxh/2
Formula area of parrallelogram-bxh
Homework Package



  1. pg. 449-451 #3-16


  2. pg. 444-445 #1-8


  3. pg. 426-427 #1-17


  4. pg. 403-407 #1-21


  5. pg. 327-329 #1-21


  6. pg. 319-322 #1-23


  7. pg. 313-315 #1-20


  8. pg. 270-272 #1-15


  9. pg. 249-251 #1-3


  10. pg. 220-221 #1-14

  • This is due on MONDAY, JUNE 7th 2010


  • PLEASE hand it in in the order above


  • If you lost it or if you didn't do it, you MUST do it again


  • Comment on ALL blogs. Even the old ones.


  • Make sure you blog THIS term



Exam Review Study Guide

Define:

Perpenducular- lines that intersect at a right angle (90 degrees)

Parallel- two lines side by side that never meet

Intersecting- when two lines meet

Perpendicular Bisector- a line that divides a line segment in half and meet at 90 degrees

Angle Bisector- a line that divides an angle into two equal parts

Acute Angle- an angle that's less than 90 degrees

Obtuse Angle- an angle that's less than 180 degrees but more than 90 degrees

Right Angle- an angle that's exactly 90 degrees

Formula Area of a Triangle- bxh/2

Formula Area of a Parallelogram- bxh



Lable

Lable the following figures:















a) Parallel

b) Perpendicular Bisector

c) Perpendicular

d) Intersecting

e) Angle Bisector

f) Acute Angle

g) Obtuse Angle

h) Right Angle

Fraction->Decimal->Percent

Fraction- out of anything

Decimal- out of 1

Percent- out of 100

Exam Review Study Guide: June 4. 10 (Part 2)

Practice
Label

Answer
a) If the base is 50m and the height is 20m of a parellelogram, what is the area?

b) Find the area of the triangle.

Label

What YOU Must Know!!
You must be able to Convert: Fractions, Decimals ,and Percentages.
When converting something into a....
Fraction, it is out of any whole number.
Percentage, it is out of 100.
Decimal, it is out of 1.

Try to convert 2/5 into a Percentage and Decimal.

*Fraction - Decimal: Numerator / Denominator
Decimal - Fraction: Convert decimal into a percentage, and convert percentage into fraction. Then simplify.
Percentage - Fraction: Whole number is numerator, and 100 is denominator. Simplify.
Fraction - Percentage: Convert fraction into decimal, and convert decimal into a percentage.
Decimal - Percentage: Decimal x 100.
Percentage - Decimal: Convert percentage into fraction, then convert fraction into decimal.
If I missed anything, comment and tell me!*
Homework Package:
1. pg. 449-451, #3-16
2. pg. 444-445, #1-8
3. pg. 426-427, #1-17
4. pg. 405-407, #1-21
5. pg. 327-329, #1-21
6. pg. 329-322, #1-23
7. pg. 313-315, #1-20
8. pg. 270-272, #1-15
9. pg. 249-251, #1-3
10. pg.220-221, #1-14
REMEMBER it is due on MONDAY, JUNE 7

Define:
perpendicular: describes lines that intersects at right angles.
parallel: two lines that never cross or meet.
intersecting: when two lines meet.
perpendicular bisector: a line that divides a line segment in half and is at right angles to it.
angle bisector: a line that divides and angle into two equal parts.
acute angle: an angle that is less than 90 degrees.
obtuse angle: and angle grater than 90 degrees.
right angle: angle exactly 90 degrees.
formula of area of triangle: base multiplied by height. divided by two.
formula of area of parallelogram: base multiplied by height.

Exam Review Study Guide: June 4. 10 (Part 1)

Definitions
Perpendicular - Lines that meet at 90°.
Parallel - Lines that never meet.
Intersecting - Lines that cross at any angle.
Perpendicular Bisector - A line that divides a line segment in half and meets at 90°.
Angle Bisector - A line that divides an angle into 2 equal parts.
Acute Angle - An angle that is less than 90°
Obtuse Angle - An angle that is greater than 90°, but less than 180°.
Right Angle - An angle that is exactly 90°.
_____________________________________________
Formula: Area of Triangle - Area = base x height / 2
Formula: Area of Parallelogram - Area = base x height

Term 3 Homework package/ Exam Study guide

Homework Package

Due on monday june 7
1.) 449-451 #3-16

2.) 444-445 # 1-8

3.) 426-427 #1-17

4.) 405-407 # 1- 21

5.) 327-329 #1-23

6.) 319-322 # 1-23

7.) 313-315 #1-20
8.) 270-272 #1-15

9.) 249-251 # 1-3

10.)220-221 # 1-14

To do these work log on to http://www.mytextbook.ca/

Exam Review Study Guide

Define:
  • Perpendicular- describes lines that intersect at right angles ( 90 degrees)

  • Parallel- describes line that is in the same plane but never cross or intersect

  • Intersecting- lines that cross st any angle

  • Perpendicular Bisector- a line that divides a line segment in half and is at right angles to it

  • Angle Bisector- a line that dicides an angle into two equal parts
  • Acute angle- angle less thatn (90 degrees)

  • Obtuse angle- angle greater than (90 degrees)

  • Right angle- angle exactly (90 degrees)

  • Formula of triangle- b times h divide by 2
  • Formula area of parallelogram- b times h

Label



















base 500 m height is 20 m, find the area of the parallelogram


a=b times h

a=50 times 20
a=1000 m2








a= b times h
a= 12 times 10
a= 60 m2
Sorry Guys I think I'm missing some notes and sorry about the gap I think something went wrong when I uploaded the pictures.
Reminder:
We have less than ten days to study for the exams. Remember to start studying now.
Anyone that wants to buy Athletic Banquet Tickets, room 2 $5 on sale now.



















































































Friday, June 4, 2010

Term 3 Homework Package-

1. pg. 449 - 451 # 3 - 16
2. pg. 444 - 445 # 1 - 8
3. pg. 426 - 427 # 1 - 17
4. pg. 405 - 407 # 1 - 21
5. pg. 327 - 329 # 1 - 21
6. pg. 319 - 322 # 1 - 23
7. pg. 313 - 315 # 1 - 20
8. pg. 270 - 272 # 1 - 15
9. pg. 249 - 251 # 1 - 3
10. pg. 220 - 221 # 1 - 14


** Remember, this is DUE MONDAY, JUNE, 7, 2010!!
if you lost your work, or never did it in the first place you have to do it either way!


Exam Review Study Guide-

Perpendicular- Describes lines that intersect at right angles. (90 degrees)
Parallel- Describes lines in the same plane that never crosses or intersect.
Intersecting- Lines that cross at any angle.
Perpendicular Bisector- A line that divides a line segment in half and meet at 90 degrees.
Angle Bisector- The line that divides an angle into 2 equal parts.
Acute angle- An angle that is less than 90 degrees.
Obtuse angle- An angle that is greater than 90 degrees and less than 180 degrees.
Right angle- is exactly 90 degrees.



Homework Package- Term 3

TERM 3 HOMEWORK PACKAGE-

Our homework package is due on Monday, June 7 2010.

Hand your package to Mr.Isfeld in this order:

1. pg. 449 - 451 # 3 - 16
2. pg. 444 - 445 # 1 - 8
3. pg. 426 - 427 # 1 - 17
4. pg. 405 - 407 # 1 - 21
5. pg. 327 - 329 # 1 - 21
6. pg. 319 - 322 # 1 - 23
7. pg. 313 - 315 # 1 - 20
8. pg. 270 - 272 # 1 - 15
9. pg. 249 - 251 # 1 - 3
10. pg. 220 - 221 # 1 - 14


* If you lost the work or never did it in the first place, You HAVE to do it again.

*
Also, Make sure you comment on all the blogs. Even the old ones!
* Everyone should have at least done one blog in term 3.

Exam Review Study Guide-

DEFINE:
Perpendicular- Describes lines that intersect at right angles. (90 degrees)
Parallel- Describes lines in the same plane that never crosses or intersect.
Intersecting- Lines that cross at any angle.
Perpendicular Bisector
- A line that divides a line segment in half and meet at 90 degrees.

Angle Bisector
- The line that divides an angle into 2 equal parts.

Acute angle- An angle that is less than 90 degrees.
Obtuse angle
- An angle that is greater than 90 degrees and less than 180 degrees.

Right angle
- is exactly 90 degrees.


Formulas :
Area of a triangle= bxh divided by 2.
Area of a parallelogram= bxh




Base-
50m Height-20m. Find the Area of the Parallelogram.
A= bxh
A= 50x20
A= 1000m "squared"


Find the area
:
A= bxh/2
A= 10x12/2
A=120/2
A= 60m "squared"




CONVERT:
fractions->decimals->Percents

3/4 = 75/100= 0.75/1

- Fractions are out of any whole number.
-Percentages are out of 100

-Decimals are out of 1


2/5= 40/100 --> 2/5=0.4/1


Remember to start studying for our exams !






















EXAM REVIEW















Perpendicular-A line that intersects at a right angle.











Parallel-Lines that never intersect.











Intersecting-Two lines that cross at any angle.











Perpendicular Bisector-A line that divides a line segment in half and is at a right angle to it.











Angle Bisector-A line that divides an angle in half.











Acute Angle-An angle smaller than 90 degrees.











Obtuse Angle-An angle larger than 90 degrees


















Right Angle-Exactly 90 degrees








Base is 50 m and the height is 20 m. Find the area of the parallelogram.
50x20=1000 m squared
The triangle is 60 m squared .
ABC is acute.
DEF is obtuse.
HIK is right.
LMNJ is angle bisector.
Convert Fractions, Decimals,Percents
3/4 x 25= 75/100 divided by 100 = 0.75/1
Fraction out of any whole number
Percent is out of 100
Decimal out of 1
2/5 x 20=40/100
2/5 divded by 5 = 0.4/1


Term 3 homework package

Your homework package is due Monday June 7 2010.
Please hand the package to me in the following order.

1. pg. 449 - 451 # 3 - 16
2. pg. 444 - 445 # 1 - 8
3. pg. 426 - 427 # 1 - 17
4. pg. 405 - 407 # 1 - 21
5. pg. 327 - 329 # 1 - 21
6. pg. 319 - 322 # 1 - 23
7. pg. 313 - 315 # 1 - 20
8. pg. 270 - 272 # 1 - 15
9. pg. 249 - 251 # 1 - 3
10. pg. 220 - 221 # 1 - 14

If you are disorganized and can't find your homework from term 3, you will have to redo any pages you are missing. Log on to mytextbook.ca for the pages you need to complete.

Tuesday, June 1, 2010

Term 3 Test/ Exam Review Study Guide

Term 3 Test, Thursday June 3


Integers- adding, subtracting, positive and negative numbers using number line or chips.

Algebra- 1 step and 2 step problems check your work

Measure Of Central Tendency- mean, median, mode, range, and outlier.

Test will be scantron. 30 questions NO EXTRA TIME

Exam Review Study Guide

27.53 + 1.09 + 62.78 + 9.87 = 101.27

849.37 - 26.08 - 329.165 = 494.125

13.94 x 22 = 306.68

451.231 ÷ 24.13 = 18.7




6 + 2 x 4 = 14

6 + 8 = 14

BEDMAS

8 ÷ (1+3) (6-2) + 3² =

8 ÷ 4 x 4 + 3² =

8 ÷ 4 x 4 + 9 =

2 x 4 + 9 =

8 + 9 = 17

4³ - (5 x 2 - 5) - (20 + 13 x 3) =

4³ - 5 - 59 =

64 - 5 - 59 = 0

11 more days to study for exams!

Monday, May 31, 2010

Exam Review Study Guide.

Define the following :
Translation : slide across a straight line
Rotation : A turn at a fixed point call Center of Rotation .
Reflection : A flip over a mirror line.


* Mirror can be anywhere; doesn't have to be on an axis .




Reminder : There is only 12 days of school left before exams, start studying tonight, and don't procrastinate to the last minute.

Tuesday, May 25, 2010

The Best Measure of Central Tendency

Choose the best measure of central tendency .


Find Mean, Median, Mode, and Range .

How many shirts should I buy for the next 30 weeks ?

Need help ? Check this link .

Im sorry guys cant find a video !

HOMEWORK

PG. 449 - 451

Monday, May 24, 2010

Review and Effects on Outliers

REMINDER !
Always
Re-order before figuring out all measurements of tendency.
mean: All the numbers added together, divide by home much digits.
median: the middle number OR (if there is no middle number) add the two middle
numbers and divide by 2.

mode: the most number(s) there.
range: diffrence between the largest and smallest values in a data set.
outlier: number(s) that don't really fit with that data set.

Find the mean, median, mode, range, and outlier(s).
a) 12, 20, 18, 15, 10, 12.
b) 48, 32, 67, 61, 47, 95, 89, 888, 1.

a) re-order: 10, 12, 12, 15, 18, 20.
mean: 14.50
median: 13.5
mode: 12
range: 10
outlier(s): No outliers

b) re-order: 1, 32, 47, 48, 61, 67, 89, 95, 888.

mean: 166
median: 61
mode: no mode
range: 887
outlier(s): 888 and 1

Here is a video that covers: mean, median, mode and range.
Here is a video that covers: range and outlier(s).

Effects on Outliers
- Some outliers need to be removed from a data set. This is typically a judgement call.

- Outliers have an effect on ALL measurements of tendency.


HOMEWORK !

PAGES 444 - 445 NUMBERS 1 to 8 !

ALSO, Don't forget, we need to hand in our Number of the Day! So make sure you're done all of it to get a good mark ! :)

Wednesday, May 19, 2010

Range and Outliers

Range - the positive difference between the largest and smallest values in a data set.
Outlier - a value that is smaller or larger than the other data value.
- a data set may have one or more outliers or no outliers.

Find the range:
a) 7, 4, 3, 6, 2, 5, 8, 3 ----> 2, 3, 3, 4, 5, 6, 7, 8 ----> 8-2 = 6
b) 11, 8, 8,5, 7, 6, 7, 6, 6---->5, 6, 6, 6, 7, 7, 8, 8,11--->11-5=6
c) -4, 3, -1, 0, 2 ----> -4, -1, 0, 2, 3 ----> 3-(-4) = 7
Find the outliers:
a) 18, 19, 79, 17, 20, 12 ---> 12, 17, 18, 19, 20, 79 ---> 79
b) 14, 14, 16, 15, 1, 16 ---> 1, 14, 14, 15, 16, 16 ---> 1
c) 98, 202, 99, 91, 2, 95, 89, 88 ---> 2, 88, 89, 91, 95, 98, 99, 202 ---> 2 and 202


HOMEWORK:
Page 437 - 439
# 1 - 16

Monday, May 17, 2010

How To Find The Mean

Mean - A measure of a central tendency
- The sum (adding) of a set of values divided by the number of values in the set.


Try This





i took this video from joshua..



Homework:
Textbook pages 431-433 # 1-16

Notes







Notes


Mean-a measure of central tendency


-the sum (adding) of a set of values

divided by the number of values in
Homework Pg.431-433 #1-16