## Monday, December 14, 2009

Convert each fraction to a decimal number. Round each decimal number to the indicated place value then convert to a percent.

a)27/56 (tenths)

0.4821428
0.5
60%

b) 125/396 (thousandths)

0.3156565
0.316
31.6%

c) 1496/2005 (hundredths)

0.746134663
0.75
35%

Repeating decimal:

A decimal number with digit or group of digits that repeats forever.

- repeating digits are shown with a bar.

eg. 0.777777.... = 0. Bar 7

Use calculator to convert these fractions to a repeating decimal.

a) 1/3

0. bar 3

b) 5/9

0. bar 5

c) 5/6

0.8 bar 3

Terminating decimal:

- a decimal number in which the digits stop.

-examples include 0.4, 0.86, 0.125

0.75 seventy-five
hundredths

75/100 = 3/4

HOMEWORK

a) 28 out of 8 b) 421 out of 560

Change each terminating decimal to a fraction.

Simplify the expression

(2+1) 2+ 3x4 2 divided by 2

Construct an angle bisector of a 60 degrees angle.

## Tuesday, December 8, 2009

### Difference

The "Whole Numbers" that are between 7 and 13 are :
8, 9, 10, 11, and 12

The difference between 13 and 7 is 6

Half this difference is 3
6 divided by 2 = 3

The number ID is halfway between 7 and 13
7 + 3 = 10 or 13 - 3 = 10

If you still don't understand this information try and solve these questions that we did during class.

1. What are the whole numbers between 68 and 72, 108.3 and 111.6
Answer : 69, 70, and 71 Answer : 109, 110, and 111

2. What number is halfway between the given numbers? a. 70 and 170 b. 1801 and 1813 c.18.4 and 6.2.

3. Is the number in the middle closer to the left number or the right number?
30/38/40 0.6/3.4/6.6 0.891/0.732/0.641 78.68/78.22/77.77
Right Left Right Right

definitions

Whole Number - a whole number is a number without a decimal ; must also not have any place value below 0, for e.g. tenths, hundredths, thousandths, etc.

Between - anything in the middle of things. for e.g. my desk is between Diana and Kathryn in math.

Difference - how many numbers it takes to get from one number to another. 7 and 13 would be 6 because it goes 7,8,9,10,11,12,then 13, 6 numbers to get from one to the other.

Halfway - a word used to describe something that is divided into 2 equal parts.
Pictures drawn on paint by me, Credits to my cousin Alvin for showing me how to do this better. Thanks Alvin.

## Monday, November 30, 2009

### "Area of a Triangle"

Triangle

Triangle:
A three sided figure
Have three angles

e.g.

Because triangle is half of a square, rectangle, or a parallelogram, the formula for finding the area of triangle is Base x Height divided by two.

or area= 45 meters squared

Here is some link to truelly understand how to finding the area of a triangle:

## Wednesday, November 25, 2009

### Area

Areas - the number of square units contained in a two dimensional shape

this square has an area of 4 square units

Area is the surface space a shape takes up.

Area of square or rectangle
Length x Width= area
L x W= area

eg.
area=L x W
area= 6x3
=18cm2

Parallelogram - a four sided figure with opposite sides parallel and equal

eg.

Base(b) - a side of two
-dimensional closed figure(shape)

Height(h) - the perpendicular distance from the base to the opp
osite side.

Base(b) is 5cm and height(h) is 3cm. Plug those value into the formula

A=b x h
A=5 x 3
A=15cm2

Find the area of this parallelogram

Find the area of this parallelogram

A=b x h
A=12 x 4
A=48m squared

Homework:

## Monday, November 23, 2009

### Angles

Angles - space between 2 connecting lines

Acute - an angle that is less than 90°

Obtuse- an angle that is greater than 90°and less than 180°
right- exact 90°
straight- 180°

angle bisector-the line that divides an angle into 2 equal parts

-equal angles are not mark with the same symbol

How to make an angle bisector

Method 1

1. use compass make an arc from the vertex that crosses both arms label them X and Y.

2. make an arc from point X and Y they must be equal size.

3. draw a line from point B to the arc intersection.

Method 2

1. use protractor measure the angle D,E,F .

2. divide your measurement by two.

3. make at 54 using protactor labelled Q

y) Join point Q with a straight line.

## Wednesday, November 18, 2009

### How to make Perpendicular lines.

Bisect
Bi- means two
Sect- means to cut
So bisect means to cut in two.

Directions:
1. Draw a line
2. Fold so pt
A is on top of pt B.
3. Use a ruler to draw a line in the crease made by the fo
ld.
4. Label the point where the two lines segments intersect P.
5. Measure the lengths of AP and
BP
What do you noticed?
7. Use a protractor to measure the 4 angles created.

What do you notice? they are all 90*

You have created a perpendicular bisector
- a line that divides another line segment in half and i
s at right angles to it.
-equal line segments are marked with " hash" marks.

use a right triangle
1. Find the length of the line segment.
2. Determine the half way point.
3. Use right triangle to create a perpendicular line.

3rd way to make a perpendicular bisector.
use compass.

step one: make an arc from point A is greater then half way.
step two: make an equal sized arc intersections with a straight line, that line is a perpendicular bisector.

Draw a 12cm line segment label it PQ. Draw the perpendicular bisector of this line segment, all three was. Label the point where they intersect R.
a. what are the lengths of PR and PR?
b. what does it mean if the lengths are different?

## Monday, November 16, 2009

### Geometry

Parallel-describes lines in the same plane that never cross or intersect.
-they are marked using arrows.

Perpendicular-describes lines that intersect at right angles (90 degrees).
-they are marked using a small square.

Measure the distance from:

A to B = 8.9 cm

B to C = 8.9 cm

E to F = 8.9 cm

F to G = 8.9 cm

I to J = 8.9 cm

J to K = 8.9 cm

What do you notice about parallel lines?

Always are the same distance apart no matter where you measure as long as you measure using parallel lines.

Identify any parallel line segments

AE // BF

BF // CG

EI // FJ

FJ // GK

AI // CK

Identify any perpendicular line segment

AE to DF

BF to EG

CG to FH

IE to DF

HOMEWORK!!

1. Are line segments AC and DF parallel?

2. Are line segments DF and BE perpendicular?

3. Are line segments AC and BE perpendicular? How do you know?

4. Would a line segment joining A to D be parallel to a line segment BE? How do you know?

## Friday, November 6, 2009

### Term Test

A reminder that we have a quiz on Tuesday, covering adding, subtracting, multiplying, and dividing decimals. Order of operations will be covered on the test as well.

Lastly, we have a Term Test on Thursday it will cover the entire term's worth of work. Be sure to start studying now, do not wait until the last minute!

## Thursday, November 5, 2009

### Number of the Day

Today's Number is : 8497.365.

Half of the number of the day is: 4248.6825.

Write the number of the day in expanded form: 8000+400+90+7+0.3+0.06+0.005=8497.365.

Write the number of the day in written form: eight thousand four hundred ninty-seven and three
hundred sixty-five thousandths.

Round the number of the day to 100: 8500.

What digit is in the tenths place: 3.

The number of the day doubled is:16994.730.

123.45 more than the number is: 8620.815.

987.65 less then the number is: 7509.715.

Cube the digit in the ones place: 7 times 7 times 7 = 343.

Square the digit in the hundreds place: 4 times 4 = 16.

Divide the number by 3.55 and round to the nearest hundredth: 2393.62.

The product of all the digits in the number of the day is: 8 times 4 times 9 times 7 times 0.3 times 0.06 times 0.005= .181440.

Homework

p.g 71-73 # 4 - 24 even only.

DON"T FORGET!!!!

QUIZ ON TUESDAY AND TEST ON THURSDAY

so study, study, sudy!!!!!!!!

## Wednesday, November 4, 2009

Number of the Day Answers :)

Today's number: 2691.348

1. 1345.674

2.2000+600+90+1+0.3+0.04+0.008

3.two thousand six hundred ninety one and three hundred forty eight thousandths

4.2700

5.3

6.5382.696

7.2814.798

8.1703.698

10.1

11.36

12.758.13

13.10,368

If you have any problems, just ask!

## Tuesday, November 3, 2009

### Scribe Post November 3, 2009

What we did today;
We had to use BEDMAS to explain these equations
BEDMAS means :
Brackets
Exponents
Division
Multiplication
Subtraction

A)
2+3x4=

2+12
= 14

B)
10-6/2=
10-3
=7

C)

(2+3)x4=

5x4
=20

D)
(10-6)/2=
4/2
=2

E)
8/2²=
8/4
=2

F)
4x3/2+5
=
12/2+5
6+5

= 11

G) Create a math equation including +,-,/,x, exponents, and brackets. The answer must be 6 and you can't repeat any digits or use zero.

(8/4) x1²+9-5
2x1+9-5
2+9-5
11-5
= 6

BEDMAS

## Monday, November 2, 2009

Order of operations

There are four operations

-Multiplication,Division=brothers

1st: brackets
2nd:exponents

3rd:division or multiply in order form left to right
4th: addition or subtraction in order form left to right

6.4+120x1.25=158

2x3/6+(2-1)=2

Annie has been asked to calculate.1.7+6+2=. She claims the answer is 3.85. Do you agree?Explain why or why not.

## Tuesday, October 27, 2009

Why we estimate-To get close to the answer
-is to make the problem eaiser
-is to know what to espect from over calculation.
1. 1.366 0.5 there's 4 of you
2. Estimate how much each get
3. Calcultae how much each get

20÷4=0.5 1/2 L over

1.0÷4=0.25 1/4 L under

1.2÷4=0.3

1.6

1.6÷4=0.4

0.46

Long Division

4 divide by 1.36=0.34

3 divide by 879=293

Number Line

## Monday, October 26, 2009

### Dividing Decimals

Division means that in the statement 6 ÷ 2 = 3 There are 3 groups of 2 in 6. As you can see on the image to the right.

Quotient- anwer to a division question.

You have \$6.00. You need pens for a scrapebooking. Fancy glitter pens cost \$0.40 each. How many glitter pens can you buy with \$6.00?

Place the decimal where it belongs on the following questions.

15.4 ÷ 3.6= 4277778

4.4÷0.42= 1047619

You can over or underestimate to figure out the answer. Find a way that works for you.

15.4÷3.6= 4.277778

4.4÷ 0.42=10.47619

Homework

Place the decimal in the correct spot.

20.1 ÷ 4.7= 42766

3.5÷ 0.213=164319

You may want to go to these websites if you want to learn more about dividing decimals and other math stuff.

http://www.mathsisfun.com/

http://www.math.com/school/subject1/lessons/S1U1L6GL.html

Here are some videos to help you with dividing with decimals and remember decimals are related to fractions and percentages.

## Wednesday, October 21, 2009

### How to estimate

Estimateing is easy in case you don't know I will show you.

5463+5675=?

You probaly know that 5000+5000=10000 and 400+600=1000 add them together and it makes 11000.75+63 will take a little longer so you just have to estimate estimateing is somewhere around the number so lets just say it makes 125 this will help you with bigger numbers or multiplication questions.

Remember estimateing is NOT exact!!!

Below is a video of how to estimateb please enjoy

Today we learned about estimateing if you are a member of www.mytextbook.com go on chapter 2page 57-59 to review it.

When you estimate everything will be easy so estimate but remember it's not exact.

## Friday, October 16, 2009

### How to Scribe October 16, 2009

highlight a title or word
look for a site for subject.
copy address bar and press the green link button then paste url.

Image
find image
press on image button and choose picture
then upload and image is always at the top

Video
go to youtube, find video for subject
copy video's embedded code (some videos don't have it)
go to blog and press "Edit Html"
go to bottom of page and enter a few times
paste the code then click compose and preview

Font
change font by clicking on arrow that says font
scroll to choose font

Colors
press the T with colors beside it
pick color of choice
choose color that's readable (never use yellow)
change the colors for titles and important facts

Size
change Size by clicking on the double T
don't go to small or to big

### Scribe Post Example

To change the font click the down arrow by the word "font" and choose the font of your choice.

To change font color, highlight the text and click the T with the colours on it.

To change the font size, highlight text and click the double T.

First you need to have a link you want to post.

Obesity

Surface Area

TO POST AN IMAGE...

1) Find a picture