Gordon's Fraction Growing Post

I could not locate my ustream test video even tho I looked through both accounts thoroughly.

Question 1: Explain how to multiply a fraction by a whole number.

I'll use 4/5 x 3 = 12/5 or 2 2/5

Now to multiply a fraction by a whole number is simple all you do is multiply the numerator (top number) by the number you are multiplying (in this case 3) so when you see 4/5 x 3 you should think 4 x 3 = 12 then simply replace the denominator (bottom number) so you'll get 12/5. Another way is to convert the whole number into a fraction by simply placing a 1 under the whole number so 3 would become 3/1 so 4/5 x 3 becomes 4/5 x 3/1 and when multiplying two fractions you multiply the numerator by the numerator and the denominator by the denominator so you end up with

4 x 3 = 12

5 x 1 = 5

so you get 12/5 but we must convert this improper fraction to a mixed fraction so we must find out how many times 5 goes into 12 it goes into 12 2 times with a remainder of 2 so we get 2 2/5.

Question 2: Explain how to divide a fraction by a whole number.
1/4 ÷ 2 = 1/8

Begin by drawing the fraction

Next Divided the picture by the whole number

Determine your answer by counting the total number of squares

= 1/8

Question 3: Solve one word problem of your choice from the questions 6-12 on page 208 of the textbook

Mark uses 1/3 of a tank of gasoline in a five-day work week driving to work and back. On average, what fraction of a tank does he use for each round trip?

The question is essentially asking what is 1/3 ÷ 5? so I'll use the method I explained earlier

= 1/15

1/4 x 1/4 = 1/16

1 x 1 = 1

4 x 4 = 16

1/3 x 2 2/4 = 10/12

2 2/4 = 10/4

1/3 x 10/4 = 10/12

1 x 10 = 10

3 x 4 = 12

1 2/3 x 2 1/5 = 55/15

1 2/3 = 5/3

2 1/5 = 11/5

5/3 x 11/5 =55/15

5 x 11 = 55

3 x 5 = 15

1 1/2 ÷ 3/4 =

1 1/2 = 3/2

3/2 ÷ 3/4 =

So what you have to do is figure out how many times 3/4 goes into 3/2 but to do that we need to find the lowest common denominator.

1/2 = 2/4

3/2 = 6/4

And 3/4 goes into 6/4 two times

And so the answer is 1 1/2 ÷ 3/4 = 2

3/4 ÷ 1/2 =

Find the lowest common denominator

1/2 = 2/4

So the question becomes 3/4 ÷ 2/4 =

And 2/4 goes into 3/4, 1 1/2 times.

And so the answer is 3/4 ÷ 2/4 = 1 1/2

Jomari's Fraction Growing Post

Dividing Fractions by A Whole Number:


Page 208 Question 7

Brianna's Fraction Growing Post

Hey everybody, today I will be talking about fractions. You can multiply and divide fractions by whole numbers and other fractions. In my post I'm going to show you how to do it all.

Starting with....MULTIPLYING BY WHOLE NUMBERS:



There are two ways of finding the product of a fraction. This is the first way is straight multiplying:

When you multiply 3 by 4/5, you get an improper fraction. You can't keep an improper fraction, so you have to turn it into a mixed fraction. First you have to find out how many times 5 goes into 12 which is 2, which would be the whole. Then the remainder which would be 2 would go over the five. So the resulting fraction would be 2 2/5.

The second way of multiplying a fraction is with a picture:

To find the product using pictures, first you have to make three groups of 4/5. Then you put all the shaded pieces together to get 2 2/5.

Time for Division


There is only one way to divide a fraction.





You have to divide a fraction using a pictures:

First you have to draw a rectangle and divide it into a half. Then you divide it into three pieces.

Which would give you 1/6.

Finally I'm going to show you how to multiply a fraction by a fraction.

Part 2

This is the second part to my growing post. I will be showing you how to multiply a fraction by a fraction, a fraction by a mixed number, and a mixed fraction by a mixed fraction.

1. Fraction by a fraction a fraction

Multiplying a fraction by a fraction is just straight multiplication, no tricks or conversions necessary.

2. A fraction multiplied by a mixed fraction:

When multiplying a mixed fraction by a regular fraction, you have to first convert the mixed fraction to make an improper fraction.

3. Mixed fraction multiplied by a mixed fraction:

When multiplying a mixed fraction by a mixed fraction, you must first convert them into improper fractions. To do that, first you must multiply the denominator by the whole number then add the numerator. Then when you have your improper fractions, you multiply them together to get your answer. If necessary, you simplify and if the numerator is bigger than the denominator, then you divide them to get a whole number and whatever is left over becomes, your fraction.

Part 3

This is part 3 of my scribe post...and hopefully the last. Anyways this part is going to be about dividing a fraction by a fraction, and dividing a fraction by a mixed fraction.

1. Fraction divided by a mixed fraction:

To divide a fraction by a mixed fraction:

First you have to find the common denominator. In this question the common denominator would be 4. Then you must find out how many times 3/4 goes into 1 1/2 which would be two times with a remainder of 1 third.

2. Fraction divided by a fraction:

To divide a fraction by a fraction, you have to find out how many times the fraction that is doing the dividing goes into the number that is being divided. For example 1/2 goes into 3/4 1 and an half times.

Karra's growing post

Mulitplication Fractions!

one way:

another way:

Divison Fractions!

1

- divided by 2

4

The areas of Saskatchewan,Alberta and Manitoba are approximately equal. The sum of their areas is about 1/5 of the areea of Canada. Express the area of these provinces as a fraction of the area of Canada.

1/5 divided by 3 because there are 3 provinces.

Answer :

1/15

Simple sentence answer

Each province cover approximately 1/15 of Canada

Part 2

Fraction x Fraction

Fraction x Mixed Number

Mixed Number x Mixed Number

Bruce's Fraction Growing Post

I couldn't upload my video, so here is the link for now.

http://www.ustream.tv/recorded/5683250

The next thing we had to do is show how to multiply a fraction by a fraction, a fraction by a mixed number and a mixed number by a mixed number.

Fraction x Fraction

1/2 x 1/2

1)you multiply the numarator by numarator to get the first answer.

1x1=1

2)you multiply the denominator by denominator to get the second answer.

2x2=4

so the answer is 2/4 (always simplfy)2/4=1/2.

Fraction x Mixed Number

3 x 1/2=

1)the whole number (3 ) is the number of groups.

2)the fraction (1/2) is how many in each group.

3 x 1/2=3/2(simplfy)1 1/2

Mixed Fraction x Mixed Fraction

When converting you use the denominator to decide the number of parts in 1 whole.

2 1/2 x 1 3/4=?

2/2 + 2/2 + 1/2=5/2

4/4 + 3/4=7/4

7/4 x 5/2= 35/8(simplfy) 35 divided by 8 = 4.375

4 x 8 = 32

35-32=3

so the answer is 4 3/8

Jasmine's Growing Post

Waaazzzaaap.

a) My recorded quiz

http://www.ustream.tv/flash/video/5683648

b) Explain Two Ways To Multiply a Fraction By a Whole Number

6. c) 5 x 1/3

1-

2- 5 x 1 5

-- -- = --

1 x 3 3

c) Explain How To Divide a Fraction By a Whole Number

5. d) 2/3 / 6

1-

2/18

simplified= 1/9

d) Word Problem
pg. 209

10. Mark uses 1/3 of a tank of gasoline in a five-day work week driving to work and back. On average, what fraction of a tank does he use for each round trip?

divide 1/3 by the five-day work week ( 1/3 divided by 5)

PART 2!

Waaazzzaaap.

1. Fraction x Fraction

2. Fraction x Mixed Number

3. Mixed Number x Mixed Number

Runcel's Growing Post

a) Post your recorded quiz.

b) Using one question from questions 6 or 7 on page 202 of the textbook, explain two ways to multiply a fraction by a whole number. You should use pictures to help explain!


The first way i did is to show a picture



So the answer is
21/10


c) Using one question from questions 4 or 5 on page 208 of the textbook, explain how to divide a fraction by a whole number. You should use pictures.





SO THE ANSWER IS 1/8

d) Pick one word problem from questions 6-12 on page 208 of the textbook.

The second part of our fraction growing post is to show our understanding of multiplying fractions.

Use our test to choose 3 questions.

1:Fraction*Fraction

2:Fraction * Mixed number

3:Mixed number* Mixed number

Jecelyn's Growing post

We have to find 2 ways to multiply a fraction usins a diagram or a chart.

1) 4 x 1/2













2)













Now I have to show how to divide from a whole number
It is 1/4 divided by 2 = 1/8










Now the word problem
A pitcher of orange juice is 2/3 full. If four students equally share the juice, what fraction of the full pitcher does each student get?

in order to get the answer you should do the following

1. read the question
2. find key words to help you get the answer

3. what fraction of the pitcher does each student get
4. you also need a simple sentence answer









each student will get 2/12 or 1/6 of the pitcher of juice




The video will come when we get back to school. Happy Easter everyone :D

Nhea's Growing Post 3/24/10

A)



B)To get the answer to this Question -

All you have to do is multiply the first number (4) by the numerator (1) but the demoniator always stays the same so you would get the answer (4/2) then you have to simplify if possible (1 2/2).
C)To Answer this question -All you have to do is use a picture (or number line) to determine the answer. Using a picture all you have to do is make a square. The number of squares going down is the same number as the single number (2) and the squares going across is the same number as the first denominator (4). Then shade in the the number of the single number (2) and use a different colour to shade in the number of the numerator (1) over the already shaded part to get your answer (1/8)

D) To answer this question -
All you have to do is shade in the number of squares that match the single number, 5, then use a different colour to re-shade the number that is the numerator, 1. Then you would get 1/15 as your answer.
Part 2

Fractions