Fraction Addition and Subtraction
2/5 + 1/4 =
8/20 + 5/20 = 13/20
What is 28 divided 9 expressed as a mixed number?
3 1/9
There are 100 students at Live Oak. 3/4 of them were boys. How many more boys than girls were there?
1/4 x 100 = 25
75 - 25 = 50
9/10 - 3/6 =
27/30 - 15/30 = 12/30 = 6/15 = 2/5
1 1/5 + 2 1/10 =
1 2/10 + 2 1/10 = 3 3/10
Mrs. Tan has a ribbon that's 9 feet long. She cuts 4 feet, and the remaining ribbon is cut into 7 shorter pieces of equal length. What is the length of each shorter piece of ribbon?
9 - 4 = 5
5:7 = 5/7 feet
What is the simplest fraction of 0.35?
35/100 = 7/20
4 1/5 + 3 2/6 =
4 6/30 + 3 10/30 = 7 16/30 = 7 8/15
Matteo’s organic farm uses 2/7 of the land to grow potatoes and 1/5 of the land to grow spinach. The remaining land is used to grow tomato plants. What fraction of the land is used to grow tomato plants?
1 - 2/7 - 1/5
= 35/35 - 10/35 - 7/35 = 18/35
1/2 + 3/4 + 7/8 =
4/8 + 6/8 + 7/8 = 17/8 = 2 1/8
5/7 - 3/8 =
40/56 - 21/56 = 19/56
Matteo uses 4/5 gallon of water om his potatoes. He uses 1/4 gallon less water on his spinach. How much water does he use for his potatoes and spinach?
4/5 + (4/5 - 1/4) = 16/20 + (16/20 - 5/20)
= 16/20 +11/20 = 27/20 =
= 1 7/20 gallon
What is the decimal of 3/8 =
0.375
3- 1 1/3 - 2/5 =
1 4/15
Anders and Joseph needed 10 liters of water to fill a tank. Anders poured 4 7/8. Joseph poured 1 2/3 less than Anders. How much waters is still needed to fill the tank?
4 7/8 + (4 7/8 - 1 2/3) =
4 21/24 + (4 21/24 - 1 16/24) =
4 21/24 + 3 5/24 = 7 26/24 = 8 2/24 = 8 1/12
= 10 - 8 1/12 = 9 12/12 - 8 1/12 = 1 11/12