Addition
2/9 + 2/9 =
4/9
8/10 - 4/10 =
2/5
1/2 x 3/5 =
3/10
What is the first thing you need to check when adding or subtracting fractions?
Hint: You cannot add/subtract fractions unless you have this first.
Check for a common denominator.
Emma baked a pie. She ate 1/4 of it, and her brother ate 2/8 of it. How much of the pie did they eat together?
They ate 1/2 of the pie together.
3/4 + 1/10 =
17/20
1/3 - 1/4 =
1/12
3/5 x 1/3 =
1/5
What is an improper fraction?
A fraction where the numerator is greater than the denominator
A recipe calls for 2/3 cup of sugar and 1/6 cup of honey. How much sweetener is needed in total?
5/6 cup.
4/5 + 4/10 =
1 1/5
2 - 1/2 =
1 1/2
5 x 3/10 =
1 1/2
Do you need to get a common denominator when multiplying fractions?
No!
You only need a common denominator for adding and subtracting fractions.
Lily ran 3/4 of a mile on Monday and 2/5 of a mile on Tuesday. How much farther did she run on Monday than Tuesday?
She ran 7/20 mile farther on Monday.
5 1/3 + 1 1/3
6 2/3
7 4/5 - 2 1/5 =
5 3/5
3 x 2 1/2 =
7 1/2
What do you use to simplify a fraction?
GCF (Greatest Common Factor)
Mia drank 2/3 of a bottle of juice. Her brother drank 1/2 as much as Mia. How much of the bottle did her brother drink?
He drank 1/3 of the bottle.
1/5 + 2/3 + 1/2 =
1 11/30
5 1/4 - 4 2/5 =
17/20
2 2/5 x 2 1/2 =
6
When multiplying and dividing fractions, what should you do first when you see a mixed number?
Change the mixed number to an improper fraction
A pizza was cut into 8 equal slices. After lunch, 5/8 of the pizza was gone. What fraction of the pizza is left?
3/8 of the pizza is left.