## Wednesday, December 9, 2009

## Tuesday, December 8, 2009

### The Half and Differences between Numbers

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.

Like this..

70 and 170

70 + 170 = 240

And divide it by two. It equals 120.

And:

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.

## Thursday, November 26, 2009

### Area

Example:

Area of square and rectangle>>> Length x Width = Area

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

Example:Height(h)- the perpendicular distance from the base to the opposite side.

Example:

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

Example:

AREA OF PARALLELOGRAM

A=B X H

(b) is 5 cm and (h) is 3cm. Plug there values into a formula...

A = B X H

A= 5 x 3

A= 15cm

http://www.youtube.com/watch?v=KVFwRA7kcLY

## Monday, November 23, 2009

### ANGLES

- An Angle That Is Less Than 90 dg.

eg.

Straight Angle

ANGLE BISECTOR

1. Fold Paper

## Wednesday, November 18, 2009

### Bisecting Perpendicular Lines

Bisect-

Bisect-

Perpendicular Bisector-

Perpendicular Bisector-

Ways to Make a Perpendicular Bisector:

Ways to Make a Perpendicular Bisector:

- Use a right triangle.

1. Make an arc from point A that is greater than half way.

Here is a video for all of you to enjoy and hopefully it will help you understand bisecting more.

** Today's Homework**

** Today's Homework**

Remember that there is going to be a test tomorrow on perpendicular, parallel and bisecting line segments. So everyone please study hard.(:

## Tuesday, November 17, 2009

### How to Draw Parallel and Perpendicular Lines

**How to Draw Parallel Lines**

**How to Draw Perpendicular Lines**

- fold paper like so:

2. use protractor like so:

Remember...

Pages 86-88 #1-16 is HOMEWORK!!!

Here is a quick link to save you the trouble of typing.

If you still have trouble with perpendicular lines, here's a video.

## Monday, November 16, 2009

### Parallel and Perpendicular lines

*- shapes and measurements.*

**Geometry****- describes two lines in the same plane that never cross, or intersect.**

*Parallel*- they are marked using arrows.

**- describes lines that intersect at right angles. ( 90°)**

*Perpendicular*- they are marked using a small square. ________________________________________________________________

measure the diference from:

A to B

B to C

E to F

F to G

I to J

J to K

they all are 8.9 cm.

_________________________

identify any parallel lines you can find.

AE // BF, EI // FJ, CG // BF, GK // JF, AI // CK

what d0 you notice about parallel lines? they always are the same distance apart no metter where you measure, as long as you measure a perpedicular line.

identify any perpendicular line segments.

AE __ DF , FE __ AI , BF __ EG , CG __ FH

What do you notice about perpendicular line segments? they all meet at 60° angles.

*****************************************************************************

here is a link to a video i watched about line parallel and perpendicular lines.

http://www.youtube.com/watch?v=Rew54K6mYUo

__________________________________________________________________

*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?*

## Monday, November 9, 2009

### Test

## Friday, November 6, 2009

### Term Test

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

### Test Answers and Homework.

Number of the test is : 8497.365

1. Half of the number of the test is: 4248.6825

2. Write the number of the test in expanded form: 8000 + 400 + 90 + 7 + 0.3 + 0.06 + 0.005

3. Write the number of the test in written form: Eight thousand, four hundred ninety-seven and three hundred, sixty-five thousandths.

4. Round the number to the nearest 100: 8500

5. What Digit is in the tenths place: 3

6. The number of the test doubled is: 16994.73

7. 123.45 more than the number is: 8620.815

8. 987.65 less than the number is: 7509.715

9. (You do not have to answer this)

10. Cube, the digit in the ones place: 7 x 7 x 7 = 49 x 7 = 343 (No, not 7x3.)

11. Square, the digit in the hundreds place: 4 x 4 = 16

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

13. The product of all digits in the number of the test is: 181440

*Please comment and tell me what I did wrong if there are mistakes. I will edit it to make sure it's right.

Todays Homework:

Pg. 71-73 #4-24 .. First do even, after do odd numbers. (ex: first do answers 4, 6, 8, etc. then do 5, 7, 9, etc.)

Reminders:

Also, PLEASE study for the test next week. Sorry to tell you guys but .. WE 7-43 HAVE 2 tests next week, one on Tuesday and one on Thursday.

## Wednesday, November 4, 2009

### Number Of The Day

1. Half of the number of the day is: 1345.674

2. Write the number of the day in expanded form: 2000 + 600 + 90 + 1 + 0.3 + 0.04 + 0.008

3. Write the number of the day in written form: Two thousand, six hundred, ninety one and three hundred, forty-eight thousandths.

4. Round the number of the day to the nearest 100: 2700

5. What is the digit in the tenths place: 3

6. The number of the day doubled is: 5382.696

7. 123.45 more than the number is: 2814.798

8. 987.65 less than the number is: 1703.698

## Tuesday, November 3, 2009

### What is BEDMAS?

Today at math we were learning BEDMAS.

1st B- ( brackets )

2nd E- exponents 32, 43

3rd D- division

----M-multiplication

4th A- addition

----S- subtraction

BEDMAS describes as the order of operations or the order of which you operate an equation.

To practice our knowledge, we were given equations to solve:

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 an equation that includes +, -, x, ÷, exponents, and brackets. The answer will equal 6. You can't repeat any number more than once and you can't use zero. Explain why you think my equation is right or wrong. If wrong, give an equation that is right and tell me what I did wrong.

This is the equation I got to get my answer:

(8x4)÷23+(9-7)=

32÷23+(9-7)=

32÷23+2=

32÷8+2=

4+2=

6

## Monday, November 2, 2009

### What we learnd today

**Today we did number of the day and we work on something called order of operation. We a word called BED MAS. B is for brackets, E is for exponents, D is for division, M is for multiplication, A is for addition and S is for subtraction. Addition and Subtractions are brothers.multiplication and division are sisters.1 brackets are (3+1) 2 Exponents are 52 3 divide or multiply in order from left to right 4 addition or subtraction in order from left to right.**

(1.75-0.5) times (4.2\0.6+7.3-1.2

0.70 times ( 4.2 \ 0.6) + 7.3 -1.2

0.70 times 7 + 7.3 - 1.2

4.9+7.3-1.2

4.9+6.1 =11

What sign goes were

5.2\4+2.1

1.3+2.1

3.4 =3.4

2 times 3 \ 6 + (2-1)

2 times 3 \ 6 + 1

6 \ 6 + 1

1+1 = 2

Annie has been asked to calculate 1.7 + 6 \2. she claims the answer is 3.85. do you agree or disagree? Explain why or why not. I think it is wrong because I 1.7 + 6 \ 2 then 1.7 + 3=4.7 so I think it is wrong.

(1.75-0.5) times (4.2\0.6+7.3-1.2

0.70 times ( 4.2 \ 0.6) + 7.3 -1.2

0.70 times 7 + 7.3 - 1.2

4.9+7.3-1.2

4.9+6.1 =11

What sign goes were

5.2\4+2.1

1.3+2.1

3.4 =3.4

2 times 3 \ 6 + (2-1)

2 times 3 \ 6 + 1

6 \ 6 + 1

1+1 = 2

Annie has been asked to calculate 1.7 + 6 \2. she claims the answer is 3.85. do you agree or disagree? Explain why or why not. I think it is wrong because I 1.7 + 6 \ 2 then 1.7 + 3=4.7 so I think it is wrong.

www.coolmath.com/prealgebra/05-order-of-opera... (its a pic)

the best song ever :D http://www.youtube.com/watch?v=M11SvDtPBhA

## Tuesday, October 27, 2009

### Why We Estimate

## Monday, October 26, 2009

### Dividing Decimals

(:(: (:(: (:(: - 3 groups of 2 smiley faces.

The word Quotient is the answer to the division question.

If you have 6 dollars and you need pens for scrap booking that are 0.40 cents each?

We used 10x10 grids to solve this problem.

I did my grid like this :

(every colour represents a new type of pen.)

The number you could get with $6 is 15 glitter pens.

If you look at the two first pictures

= 5 glitter pens. and this is equal too $2 , 2 goes into 6 3 times. So, multiply the 5 x 3 = 15 glitter pens.

Now if you estimate, and make it an EASIER question, this is how you do it.

.40 round it off to 0.50 and round it to 2.

2

+2 - 2

__

4 -4

+2

__

6 - 6

+2

__

8 - 8

+2

__

10 - 10

+2

__

12 - 12

Where to put the decimal?

4/3.6=42778.

Round 3.6 to 4.

Now, change the question to a multiplication question.

4x4=16.

Now divide the 16 by 4.

16/4=4.

4 is nearer than 42. So put the decimal between the 4 and the 2.

4/3.6=4.2778.

This is a lady showing you how to divide decimals, if you need any help.

## Tuesday, October 20, 2009

### Multiplying Decimals

One thing the video brought up is that even though it looks like the answer is 3,864 you have to consider the numbers after the decimal point that hold value. In the equation the digits .1 and .4 are after the decimal point so you move the decimal point two places to the left. You will get 38.64 instead of 3,864.

I'm sorry about the fact that my keyboard doesnt have a divide button on it.

Remember: Math Links page 57-59 numbers 3-21 isn't homework

Here's an excellent link to a website that explains the concept of multiplying decimals well.

## Monday, October 19, 2009

### Estimating Decimals with Multiplication

What is the total when estimating?

1.69 x5= Tax is included.

Younger sister says it only costs 5 bucks.

Older brother says it only costs 10 bucks.

What are they thinking, how are they estimating?

Younger sister is thinking Under estimating, just 1.00x5= $5.00

Older brother is thinking Over estimating, 2.00x5= $10.00

Where do the decimals go?

2.2 x 1.8= 3960

Where do the decimals go here?

3.9 x 5.8= 22620

Is $9.00 enough and prove it.

2.57 x 0.45= 118220

Pronghorn: 58kg Dall's: 1.5 times as much as a pronghorn.

How much does Dall's weigh?

Approximate: 90kg. 60x1=60 kg.

90 kg. (In between the two weights.)

60x2=120 kg.

Exactly: 87kg.

Homework is:

46x2.5 = 64x4.5 = First estimate then calculate.

Here is a video for multiplying decimals. If you click multiplying decimals it will take you to a link that explains the multiplying of decimals. Good Luck and I hope it isn't hard to understand.

Mr.Isfeld will be collecting number of the day tomorrow.

## Friday, October 16, 2009

### How To Scribe

Link- highlight a word and press the green button. Then look for a site that you think would build interest and that is about the topic. Then you copy and paste the URL. After you get a link, click preview to check the link. Check out this link!

Image- find an image (google image) then save it to your computer. Then browse and find the image. You can change the layout and size. Then press upload image. See this image!

Video-Go to youtube and find a video that will build interest about the topic you are discussing. Once you've found a video, click on the grey box anf highlight and copy the code that is in the box titled "embed". Then click edit HT.ML. Scroll to the bottom then pick the code and press preview. See this video!:

Font-To change the font, click the arrow next to the word "font." Scroll down and find a don't that you like and that all can read.

Colour-To change the color, click on the T with the colored squares. Then choose a color. It is best to change the color of important facts, but try not to use bright colors that are hard to see.

Size- To change the size, click the sign with the double T's. Then change the size you want to write with. Don't pick anything too small or too large.