Download - Example Karen’S Math Review2
Karen’s math review
Adding and subtracting fractions
Adding fraction with like denominators
If the denominator (the bottom number) is the same Add the numerators (the top number) Keep the bottom number the same Simplify your answer
example
Adding if denominators are different
If the denominator (the bottom number) is the different Find the LCM (least common multiple) of
the denominator Multiply the fractions by the factor that
will create common denominators Add the numerators (the top number) Keep the bottom number the same Simplify your answer
example
The LCM is 6 so multiply the first fraction The second fraction would
be multiplied by 2
Example continued
The two new fractions are
Since denominators are the same, add the numerators and keep the denominators the same and simplify
Subtracting fraction with like denominators
If the denominator (the bottom number) is the same subtract the numerators (the top
number) Keep the bottom number the same Simplify your answer
example
Subtracting if denominators are different
If the denominator (the bottom number) is the different Find the LCM (least common multiple) of
the denominator Multiply the fractions by the factor that
will create common denominators Subtract the numerators (the top
number) Keep the bottom number the same Simplify your answer
example
The LCM is 6 so multiply the first fraction by 3
The second fraction would be multiplied by 2
Example continued
The two new fractions are
Since denominators are the same, subtract the numerators and keep the denominators the same and simplify, if needed
Sample test
Solve1. 5/8-3/8=2. 4/3+3/43. 1 ¾+2 ¼4. 2 3/8-1 ½
Which is more5. 4/5 2/3
Sample test
Which is in lowest form6. 4/6 2/3 13/267. 8-2/38. 6/7+3/109. 2/3+210. ¼+1/2+1/411. What is 1st step in subtracting fractions with different denominators?
Sample test
12. What is the 3rd step in adding mixed numbers?
What operations sign will make these two equations correct?13. ½ ¼ =3/414. 3 1/3 1 5/6= 1 ½
What can you change to make this equation correct?15. ½ -1/3 =1
Sample testWrite two mixed number problems that will give you the
answer ½16.17.
What would happen if you subtract a fraction from a whole number?
18.Why does ¼+1/2 not equal 1/6?19.Draw and label a square whose perimeter is 1 inch.20.