Adding Fractions with unlike denominators
1/2 + 1/4=
3/4
1/2 - 1/4=
1/4
3/4 + 2/3=
17/12 OR 1 5/12
What is a denominator?
The number below the line in a fraction.
Mr. Kim mowed 1/2 of his lawn. His son mowed 1/6 of it. How much of the lawn was mowed?
4/6 or 2/3
1/6 + 2/3=
5/6
2/3 - 1/6=
3/6 OR 1/2
1/4 + 5/12=
8/12 OR 2/3
What is a numerator?
The number above the line in a fraction.
Meredith went to the movies. She spent 2/5 of her money on a ticket and 3/7 of her money on popcorn. How much of her money did she spend?
29/35
1/5 + 3/10=
5/10 OR 1/2
1/5 - 1/10=
1/10
2/4 + 4/16=
12/16 OR 3/4
What does equivalent mean?
Equal in value or the same in value.
Mr. Kim mowed 1/2 of his lawn. His son mowed 1/6 of it. How much of the lawn still needs to be mowed?
2/6 or 1/3
6/12 + 2/6=
14/12 OR 1 2/12 Or 1 1/6
2/4 - 2/8=
2/8 OR 1/4
3/5 - 4/15=
5/15 OR 1/3
What does simplify mean?
To reduce a fraction to it's simplest form or make the fraction as small as possible.
Jing spent 1/3 of her money on a pack of pens, 1/2 of her money on a pack of markers, and 1/8 of her money on a pack of pencils. What fraction of her money is left?
1/24
2/7 + 7/14=
11/14
4/6 - 1/12=
7/12
2/7 - 2/21=
4/21
What is a common denominator?
When the bottom number of the fraction is the same for both fractions.
Leonard spent 1/4 of his money on a sandwich. He spent 2 times as much on a gift for his brother as on some comic books. He had 3/8 of his money left. What fraction of his money did he spend on the comic books?
1/8