Friday, April 2, 2010

Sharmaine's growing post

A) This video show how i got my answer to my fraction quiz.
It show you how to divide and multiply factions with whole numbers.

B) Two ways of multiplying a fraction with a whole number is by drawing a picture.

-an example would be drawing 5 groups of 2/3. Then you would add up each group giving your answer.

Another way would be multiplying the two numerators toge
ther and keeping the denominator the same.

C) To divide a fraction by a whole number you can draw a fraction strip.

My example is 1/4
÷ 2.

Use your fraction strip and divide it into fourths. Then color in 1/4 of it. Next you divide your fraction strip in half horizontally. As shown in the picture below

C) How to solve a word problem:
-well first the problem is:
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?

Next you find the key words:
-2/3 full
-4 students
-what fraction of the full pitcher does each student get?

You will need to have a simple sentence answer:

Each student will get______of the pitcher of orange juice.

Finally you will have to solve it. To solve thi
s equation i used a fraction strip and divided it into 3rds and colored in 2/3 of it. Next I divided the strip in 4 vertical and colored in 2 rectangles giving me my answer.


Part 2:

a) fraction x fraction: when you multiply a fraction by fraction, the first step is to multiply the two numerators. Then multiply the two denominators. Once you are done that you must simply your fraction if it is not yet.

3/4 x 2/5 = 6/20

b)fraction x mixed number: When you multiply a mixed number and a fraction the first step is to convert the mixed number into an improper fraction by multiplying the whole by the denominator and the adding the numerator. once you get the improper fraction, you multiply the two numerators and the two denominators. If your answer is an improper fraction, you have to change it back to a mixed number by dividing the numerator by the denominator. Then put in it lowest terms. But if your answer is a proper fraction, you just simply it to the lowest terms.

4 7/8 x 1/7 = 39/56

c)mixed number x mixed number: When you multiply mixed numbers you have to change them into improper fractions. next, you multiply the numerators and denominators. After that, you turn that improper fraction back into a mixed number. Once everything is done we simply it .

2 1/3 x 2 1/3 = 14/9


Part 3:

How many 3/4's are there in 1 1/2?

To answer this equation first you draw 1 1/2 color in the whole and 1/2. next divide 1/2 into 4th. finally count how many times 3 goes into 1 1/2

how many 1/2's are there in 3/4?

To answer this equation first you draw 3/4. Next you draw a line going across to draw the 1/2. The numerator of the half is 1, so how many times does 1 goes into the shades squares? 6 times.


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