Arielle's Last Fraction Post

Monday, May 11, 2009
Adding Fractions

[1] Find the LOWEST COMMON DENOMINATOR
[2] Add up the numerators with the new denominator
[3] Simplify fraction







Adding Mixed Numbers
[1] Convert the mixed numbers into IMPROPER FRACTIONS
[2] Find the lowest common denominator
[3] Add up the numerators with the new denominator
[4] Convert the fraction to a mixed number
[5] Simplify fraction






Subtracting Fractions

[1] Find the lowest common denominator
[2] Subtract the numerators with the new denominator
[3] Simplify fraction





Multiplying Fractions

[1] Multiply the numerators together
[2] Multiply the denominators together
[3] Simplify fraction



Multiplying Mixed Numbers
[1] Convert the mixed numbers into improper fractions
[2] Multiply the numerators together
[3] Multiply the denominators together
[4] Convert the fraction to a mixed number
[5] Simplify fraction



Dividing Fractions
[1] Turn the second fraction into a reciprocal (upside down)
[2] Multiply the first fraction to the second fraction
[3] Convert the fraction to a mixed number
[4] Simplify fraction




Dividing Mixed Numbers
[1] Convert the mixed numbers into improper fractions
[2] Find the reciprocal of the second fraction
[3] Multiply the first fraction to the second fraction
[4] Convert the fraction to a mixed number
[5] Simplify fraction




Problem Two
It takes 2 1/4 scoops of flour to make one cake. How many cakes do 15 scoops of flour make?

Problem Three

One day in WInnipeg with 10 1/2 hours of daylight, it was sunny for 1/3 of that time. For how many hours was it sunny that day?

Krissia's Last Fraction Post

Adding Fraction

  1. Find the common denominator.
  2. Add the numerator to numerator.
  3. Add the denominator to denominator.
  4. If it can be simplified, simplify it.








Subtracting Fraction

  1. Find the common denominator.
  2. Subtract the numerator to numerator.

  3. Subtract the denominator to denominator.

  4. If it can be simplified, simplify it.
















Adding Mixed Fraction

  1. Convert mixed fractions into improper fractions

  2. Find the common denominator.

  3. Add the numerator to numerator.

  4. Add the denominator to denominator.

  5. If it can be simplified, simplify it.















Multiplying Fractions

  1. Multiply the numerator to numerator.

  2. Multiply the denominator to denominator.

  3. If it can be simplified, simplify it.













Multiply Mixed Fractions


  1. Convert mixed fractions into improper fractions.
  2. Multiply the numerator to numerator.

  3. Multiply the denominator to denominator.
  4. If the answer is improper, convert improper fractions into mixed fractions.

  5. If it can be simplified, simplify it.

















Dividing Fractions


  1. Find the reciprocal of the fraction (flip one of the fraction).
  2. Change dividing into multiplying.

  3. Multiply the numerator to numerator.
  4. Multiply the denominator to denominator.

  5. If it can be simplified, simplify it.










Dividing Mixed Fractions


  1. Convert mixed fractions into improper fractions.
  2. Find the reciprocal of the fraction (flip one of the fraction).

  3. Change dividing into multiplying.
  4. Multiply the numerator to numerator.

  5. Multiply the denominator to denominator.
  6. If it can be simplified, simplify it.















Problem #2













Problem #3


Sean's last fraction post

Adding


1/4 + 1/5






First you have to find the common denominator









Then you just add the numerators and simplify if you can


1/6 + 3/4











Multiplying


4/5 x 2/5

All you have to do is multiply the numerators and the denominators






If you are multiplying a mixed fraction first you multiply the denominator with the whole number and add the numerator then multiply the numerators and the denominators.







If you have an improper fraction then you find how many groups of the denominator fit into the numerator


Dividing


1/4 1/8


For dividing you have to use a special technique called a repical.









Subtracting


4/5 - 3/5


subtracting is just like adding. First you find the common denominator. Then you just subtract the numerators.








1/6 - 3/4













If you simplify 4/24 it is 1/6


Word Problems


2) It takes 2 1/4 scoops of flour to make one cake. How many cakes do 15 scoops make?

15 scoops will make 6 1/2 cakes.


3) One day in Winnipeg with 10 1/2 hours of daylight, it was sunny for 1/3 of that time. For how many hours was it sunny that day?



Gelli's Last Fraction Post

Adding Fractions:

1st step: Find a common denominator.
2nd step: Add the numerator to a numerater
3rd step: Add the denominator to a denominator.
LAST step: Simplify it. (only if possible)

Subtracting Fractions:

1st step: Find a common denominator.
2nd step: Subtract the numerator to a numerator.
3rd step: Subtract the denominator to a denominator.
LAST step: Simplify it. (only if possible)

Adding Mixed Numbers:

1st step: Convert the mixed numbers into improper fractions.
2nd step: Fina a common denominator.
3rd step: Add the numerator to a numerator.
4th step: Add the denominator to a denominator.
5th step: Convert the answer into a mixed number.
LAST step: Simplify it. (only if possible)

Multiplying Fractions:

1st step: Multiply the numerator to a numerator.
2nd step: Multiply denominator to a denominator.
LAST step: Simplify it. (only if possible)

Multiplying Mixed Numbers:

1st step: Convert any of the mixed numbers into improper fractions.
2nd step: Multiply the numerator to a numerator.
3rd step: Multiply the denominator with a denominator.
4th step: Convert the answer into a mixed number.
LAST step: Simplify it. (only if possible)

Dividing Fractions:

1st step: Find the reciprical. (one of the fractions upside down)
2nd step: Multiply the numerator to a numerator.
3rd step: Multiply the denominator to a denominator.
4th step: Convert the fraction into a mixed fraction.
LAST step: Simplify it. (only if possible)

Dividing Mixed Numbers:

1st step: Convert the mixed numbers into improper fractions.
2nd step: Find the reciprical. (one of the fractions upside down)
3rd step: Multiply the numerator to a numerator.
4th step: Multiply the denominator to a denominator.
5th step: Convert the answer into a mixed number.
LAST step: Simplify it. (only if possible)

Word Problems:

Problem # 2:
Problem # 3:

Fractions Word Problems

The Fractions word problems from a long time ago.

#1
One week, Kristi worked 3 days at a department store for 3 1/2h each day. She was paid $9/h.
A How many hours did Kristi work that week?
 
3 1/2 x 3/1= 21/2  =10 1/2

Kristi worked 10 and 1/2 hours in the department store.

B How much did Kristi earn that week?
 
9/1 x 21/2 =189/2  =94 1/2  =$94.50

#2
Jupiter completes about 2 2/5 rotations every 24 hours. How many rotations does Jupiter complete in 1 Earth week?

 2 2/5 x 7/1 =  12/5 x 7/1 =84/5  =16 4/5

Jupiter completes 16 4/5 rotations around earth every week

#3
A sailboat is sailing at 8 1/2 km/h. If the weather conditions and the current do not change, how far will the sailboat travel in 1 1/3 h?

 8 1/2 x 11/3= 68/6   =11 1/3

The sailboat will travel 11 1/3 km

#4
The distance to Grandma's house is 4/5 of the distance to Uncle Glen's house. If Uncle Glen's house is 3 1/2 hours away, how long will it take to get to Grandma's house if you travel at the same speed?

 3 1/2 x 4/5 = 28/10  =2 8/10  =2 4/5

it would take 2 4/5 of an hour to get to grandma's house.

#5
It takes 3/5 of a tank of gas to get to work and back each day. How much gas is used over 5 work days?

 3/5 x 5/1 =15/5  =3/1  =3

It would take 3 tanks of gas for every 5 work days.

#6 
Owen is 2 1/4 times as old as Robin. When Robin celebrates his 8th birthday, how old will Owen be?


 2 1/4 x 8/1=  2/1 x 8/1= 18/1  =18

When Robin is 8 Owen will be 18 years old.

#7
The karate club is arranging a grading for its members. It takes 3 1/4 hours to test a group of 4 candidates. How long will the club need in order to process 3 groups of 4 candidates each?

 3 1/4 x 3/1 = 39/4 =9 3/4

The club will spend 9 and 3/4 of an hour grading its members.

Last Fraction Post

Sunday, May 10, 2009
1. Add and subtracting fractions isn’t that hard. All you have to do is add (or subtract) the top number and then you write the sum over the common Denominator.

2. Multiplying Fractions isn’t all that hard either. If the Fraction is not in its lowest terms then you must simplify. After that you multiply the numerators to get a new one. Then you do the same to the denominators. If you can simply go for it. Here is a Picture. \/ \/ \/


(sorry that its kind of big)


3. To divide fractions you must flip the divisor. Then you just multiply the fractions. Sounds Easy. Here is a picture. \/ \/ \/

( again sorry that its kind of big)


4.

Joseph's Last Fraction Post
















ADDING:

1) Find the common denomintor

2) Add numerator to numerator and denominator to denominator

3) Simplify if possible




















ADDING MIXED NUMBERS:

1) Convert mixed numbers into improper fractions

2) Find a common denominator

3) Add numerator to numerator and denominator to denominator

4) Convert answer into mixed number

5) Simplify if possible























SUBTRACTING FRACTIONS:

1) Find the common denominator

2) Subtract numerator from numerator and denominator from denominator

3) Simplify if possible























MULTIPLYING MIXED NUMBERS:

1) Convert any mixed numbers into improper fractions

2) Multiply numerator with numerator and denominator with denominator

3) Convert answer into mixed number

4) Simplify if possible



















MULTIPLYING FRACTIONS:

1) Multiply numerator with numerator and denominator with denominator

2) Simplify if possible























DIVIDING FRACTIONS:

1) Find the reciprocal ( flip one of the fractions upside down)

2) Multiply numerator with numerator and denominator with denominator

3) Simplify if possible

























DIVIDING MIXED NUMBERS:

1) Convert mixed numbers into improper fractions

2) Find the reciprocal ( flip one of the fractions upside down)

4) Multiply numerator with numerator and denominator with denominator

5) Convert answer into mixed number

6) Simplify if possible





















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