This powerpoint explains and demonstrates the distinct procedures for adding and subtracting fractions, or for multiplying and dividing them.

2. 
Add or Subtract
fractions

Multiply or Divide
fractions

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3. That will determine what you should do next

4. 
Decide on the least common denominator (LCD)

Multiply by the same number in the numerator and
denominator of each fraction to make equivalent
fractions that contain the LCD

Add or subtract the new numerators

Reduce your fraction using lowest terms

5. Do the
same thing
with the
fractions
when you
have to
add or
subtract
mixed
numerals


6. You don’t want an LCD
 Multiply the numerators straight across
 Multiply the denominators across also
 Reduce your fraction to lowest terms

OR
Reduce any numerator/denominator
combo you can first
 And then multiply


7. Convert
mixed
numerals
to
improper
fractions
before you
begin to
multiply


8. Dividing
Multiplying



9. Always keep in mind
whether you are
adding/subtracting, or
multiplying/dividing, and
you’ll know what needs
to be done.