Definitions/Rules
The bottom number of a fraction is called...
What is denominator
If you are dividing mixed numbers, what should you do?
Convert to improper fractions, then divide (KCF)
1/2 ÷ 4
1/8
1/2 ÷ 1/3
3/2 = 1 1/2
1 2/3 ÷ 3 1/3
1/2
The top number of a fraction is called...
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
5/6 ÷ 3/8
2 2/9
2 1/4 ÷ 1 1/2
1 1/2
The three steps used when dividing fractions?
What is Keep, Switch, Flip
When dividing fractions, what do you do to the division sign?
Switch it to multiplication.
1/3 ÷ 4
1/12
4/7 ÷ 2/3
12/14 = 6/7
10 1/2 ÷ 1 2/3
6 3/10
What do you do when dividing whole numbers by fractions?
What is put the whole number over 1
When dividing fractions, what must you do to the second fraction in the problem?
Find its reciprocal or flip it
2 ÷ 1/4
8
5/9 ÷ 1/2
10/9 = 1 1/9
8 3/4 ÷ 2 2/5
175/48 or 3 31/48
What is the term used to describe the fraction that is "flipped"?
What is Reciprocal?
What does it mean to simplify a fraction?
Putting a fraction in its simplest, lowest form
Model 3 ÷ 3/5
5
Model 4/5 ÷ 1/10
8
Janelle bought 9 1/2 yards of fabric. She plans to make small pillow cases that use 3/4 yard of fabric. How many complete pillow cases can she make?
12 2/3
So, she can only make 12 pillow cases.