Adding Fractions
2/5 + 2/5 =
4/5
Decompose this fraction in two ways:
3/5
1/5 + 1/5 + 1/5
3/3 - 1/3 =
2/3
5 4/8 + 2 1/8 =
7 5/8
To break a larger fraction into smaller fractions.
Decompose
3/8 + 4/8 =
7/8
Decompose this fraction in two ways:
9/12
3/12 + 4/12 + 2/12
5/6 - 2/6 =
1/2
3 3/6 + 1 5/6 =
5 1/3
The bottom number of a fraction.
Denominator
2/4 + 1/4 + 1/4 =
Decompose this fraction in two ways:
1 1/2
1 + 1/4 + 1/4
8/10 - 4/10 =
2/5
5 7/10 - 4 5/10 =
1 1/5
Fractions that name the same amount but use different numbers.
Equivalent Fractions
Reduce. 7/12 + 2/12 =
3/4
Decompose this fraction in two ways:
2 2/3
1 + 1 + 1/3 + 1/3
Jerry's mom made a pumpkin pie. She sliced the pie into eight pieces. She had one slice before anyone saw it! Then Jerry and his brother came by and ate two slices each the next day. Their dog ate one, too. How many slices are still left?
None. We all know that if a dog is going to eat one slice, he is going to eat all that is left!
Just kidding. He's a good boy!
1/4
6 2/8 - 3 4/8 =
2 3/4
A whole number with a fractional part.
Mixed Number
4/10 + 5/10 + 3/10 =
1 1/5
Decompose this fraction in two ways without using a 2 as a denominator:
2/2
1/5 + 2/5 + 2/5
Josie bought a box of Girl Scout Thin Mint cookies with 20 cookies in the box. She ate five of them. Then she shared them with her two friends and Mr. Olmsted. What fraction of the whole box does each person get?
The friends don't get any because Mr. Olmsted stole them ALL when they were at Specials!
Just kidding. He's a good boy!
1/4
9 - 3 3/6 =
5 1/2
Two or more fractions that have the same bottom number.
Like denominators