What needs to be the same when you add and subtract fractions?
The denominator
2/3 * 4/5
8/15
1 1/2 * 5
15/2 or 7 1/2
What is the reciprocal of
11/8
8/11
Multiply straight across (multiply numerators and multiply denominators)
How do we change a whole number into a fraction?
Put a 1 in the denominator, or put it over 1.
3/5 * 7/8
21/40
5/6 * 1 1/3
10/9 or 1 1/9
3/8 -: 2/3
9/16
Find the reciprocal of 14
1/14
3 word phrase to help us with dividing fractions.
Keep - Change - Flip
4 * 7/8
7/2 or 3 1/2
1/2 x 9
4 1/4
6 -: 5/8
48/5 or 9 3/5
Make 1 4/10 into a improper fraction
14/10
When dividing fractions, you are changing into ______________________ fractions?
multiplying
17/3 or 5 2/3
2 1/4 x 4/9
1
1/2 -: 5/8
4/5
3/12 x 1/4
3/48
What should you do first to mixed numbers when multiplying or dividing fractions?
Convert them to improper fractions.
Change them to improper fractions.
Make them improper fractionns.
2/9 * 3/8
1/12
2 2/3 * 5 1/4
14
3/8 -: 7/12
9/14
What is Ms.Z favorite Christmas movie?