Fraction Rules
What is the numerator?
The number at the top of the fraction that tells us how many pieces we have or don't have.
1/2 + 2/3
7/6 or 1 and 1/6
1 and 8/11 + 2/8
1 43/44
True or False: Some equivalent fractions will have the same numerator or denominator.
False: when making equivalent fractions the numerator AND denominator both change.
5 / 8 of the staff are male. 5 / 12 of the staff works part time at the aquarium. What fraction of the staff is female?
3/8 of the staff are female
( 1 - 5/8 = 3/8)
What is the denominator?
The number at the bottom that tells us how many total pieces are in the whole.
2/3 - 3/8
7 / 24
2 - 4/8
1 and 1/2
? / 3 = 12/18
2
A baby otter was born 3 / 4 of a month early. At birth, its weight was 7 / 8 kilograms, which is 9 / 10 kilogram less than the average weight of newborn otter in the aquarium. What is the average weight of newborn otter?
The average weight of newborn otter is 1 and 31 / 40 kilograms.
If you add or subtract fractions what has happen?
They need to have the same denominator?
1/4 + 6/8
1
10 and 2/6 + 1 and 5/12
11 and 3/4
6/12 = ? / 72
36
The penguin nursery is open two times a day: 2 / 3 hour at noon and 5 / 12 hour in the afternoon. How much time is the penguin nursery open every day?
The penguin nursery opens 1 and 1 / 12 hours.
a fraction is the same as what operation?
division
4/5 - 2/3
2/15
4 - 7/12
3 and 5/12
Turn this fraction into a mixed number: 19/2
9 and 1/2
Two kinds of fish can be found in a small tank that is 5 and 1 / 7 feet long. The blue fish is 2 / 15 feet long and the orange fish is 7 / 10 feet long. How much longer is the orange fish?
The orange fish is 17 / 30 feet longer than the blue fish.
True or False: When you add or subtract fractions the denominator gets added and subtracted.
False: the denominators stay the same, which is why both fractions need the same denominator.
1/11 + 2/12
17/66
17 and 5/6 - 1 and 3/5
16 and 7/30
Simplify to the smallest fraction: 12/24
1/2
The sharks are fed three times a day. During the morning feeding, 2 / 15 of a ton of fish is fed. During the afternoon feeding, the weight of fish fed will be 1 / 15 of a ton more than the fish fed during the morning. If the total weight of fish fed in a day is 1 / 2 of a ton, how much is fed during the feeding at night?
1/6 is fed at night