Converting and Subtracting mixed numbers:

Converting mixed numbers and Improper Fractions:

Hi everybody! Today in class, we learnt about converting mixed numb

ers and improper fractions. These were some of the examples that helped us learn about converting

Sometimes when we convert, there is more than one whole, and can be simplified. Since 4 x 3 = 12, you need 2 more to make 14, so you add an extra two fourths. Because 2/4 is divisible, you simplif

y it to make it 1/2. 14/4 = 3 and 1/2.

Subtracting Mixed Numbers:

In order to subtract mixed numbers, there are 4 steps for you to solve your problem

1st- check for common denominators

2nd- subtract the fractions

3rd- subtract the whole

4rth- simplify

Here is an example of how you subtract

mixed numbers:

Let's try a harder one this time?

Notice there no common denominators? Make sure that the denominators equal a common denominator so that 4 and 1/4 and 3 and 2/5 have a denominator of 20. This turns the fractions into 4 and 5/10 and 3

and 8/20.

I hope this helped you guys! (:

Here is a helpful video for subtracting mixed numbers and a video for adding mixed numbers

Common Denominators

A common multiple of the denominators of a set fractions

A common denominator for 1 over 4 and 1 over 6 is 12 because a common multiple of 4 and 6 is 12



Multiples ( skip count )



The product of a given number and a natural number like 1,2,3 and so on



For example some multiples of 3 are 3,6,9,12



1x3=3 ,2x3=6, 3x3=9,3x4=12



List 5 multiples of 4



Don't find factors



4,8,12,16,20,24



1 over 2 and 2 over 3 find common denominator

(find multiples first than find LCF )



multiples of 2 are 2,4,6,8,10 multiples of 3 are 3,6,9,12,15



The LCF is 6 so



1 x3 3

2 x3 6 What you do to the bottom you must do to the top



2 x2 4

3 x2 6 What you do to the bottom you must do to the top

Sorry guys I could add a picture or a video

Subtracting Fractions with Like Denominators

Subtracting Fractions with Like Denominators

When subtracting fractions its like adding fractions but insted you subtract the numerator NOT the denominator.

Here is an example we did in class...

And you see that the denominator did not change.

Here is an example of subtracting decimals but using pictures....

Here are some of the homework questions.....

That is how to subtract decimals and remember don't ever change the denominator when adding or subtracting decimals.

Math Notes 3/1/11

Anything can be a whole.







Using a picture, add the following, and write your answer in lowest terms



Fraction equivalent to - If the numerator and the denominator are the same number, the fraction equals.





Math Homework:

Circle the number which the following number is divisible by:

1512- 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
1344-1, 2, 3, 4, 5, 6, 7, 8, 9, 10
2100-1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Make up a 5-digit number that is divisible by 1-10

Here is a game