Definitions/Rules
The bottom number of a fraction
What is denominator
If you are dividing a whole number by a fraction you must first do what to the whole number?
Put a 1 underneath it to make it a fraction.
1/2 ÷ 4
1/8
1/2 ÷ 1/3 - Simplest form
3/2 = 1 1/2
A grocery store sells apples in 2/5kg bags. A Mrs. S. bought 4 kg of apples for a school experiment. How many bags did she buy?
What is 10 bags?
4 ÷ 2/5 =
4/1 * 5/2 = 20/2 = 10/1 = 10
The top number of a fraction
What is the numerator
When dividing fractions, what do you do to the first fraction in the problem?
KEEP it the same.
3 ÷ 1/3
9
4/7 ÷ 2/3 - Simplest Form
12/14 = 6/7
There is 1/3 gallon of water in a 3-gallon container. What fraction of the container is filled?
What is 1/9 of the container?
? * 3 = 1/3
1/3 ÷ 3 =?
1/3 * 1/3 = 1/9
The three steps used when dividing fractions?
What is stay, Change, flip
When dividing fractions, what do you do to the division sign?
Change it to multiplication.
1/3 ÷ 4
1/12
5/9 ÷ 1/2 - Simplest Form
10/9 = 1 1/9
The area of a rectangle is 14 1/2 cm2 and one side is 4 1/2 cm. How long is the other side?
What is 3 2/9cm?
14 1/2 ÷ 4 1/2 =
29/2 ÷ 9/2 =
29/2 * 2/9 = 29/9
This is what you do to a mixed number when dividing fractions.
Multiply the denominator with the whole number and then add the numerator.
When dividing fractions, what must you do to the second fraction in the problem?
Find its reciprocal or flip it
2 ÷ 1/4
8
Select all statements that show correct reasoning for finding 1/5 ÷ 2/9.
Multiply 15 by 2, then divide by 9.
Multiply 15 by 9, then divide by 2.
Multiply 15 by 19, then multiply by 2.
Multiply 15 by 9, then multiply by 12.
What is :
Multiply 15 by 9, then divide by 2 and
Multiply 15 by 9, then multiply by 1/2.
A triangle has a base of 3 2/5 inches and an area of 5 1/10 sq inches. What is the height of the triangle?
What is 3 inches?
1/2 * (3 2/5) * h = 5 1/10
5 1/10 ÷ (1/2 * 3 2/5) = h
5 1/10 ÷ 17/10 = h
51/10 * 10/17 = 3
What is the correct term for "Flip"?
What is Reciprocal?
Fractions should always be in this form unless told otherwise: ______.
Simplest form
1/4 ÷ 2
1/8
5 3/4 divided by 6 - Simplest Form
What is 23/24
A pool is in the shape of a rectangular prism is beig filled with water. The length and width of the pool is 24 feet and 15 feet. IF the height of the water is 1 1/3 feet, what is the volume of the water in cubic feet?
What is 480 cubic feet?
lwh=v
24 * 15 * (1 1/3) =
360 * 4/3 = 480