Fraction Rules
When dividing fractions what is the third step?
Reciprocal
2/3 * 9/6
1
1 1/2
3/2
11/8
1 3/8
What is the reciprocal of
2 1/12
12/25
How do we change a whole number into a fraction?
Put a 1 in the denominator, or put it over 1.
4/15 * 3/8
1/10
4 1/3
13/3
13/3
4 1/3
2 1/8 -: 3
17/24
What does FIRM mean?
Fraction, inverse, reciprocal, multiply
4 * 7/8
7/2 or 3 1/2
3 3/9
30/9
7/2
3 1/2
1 1/8 -: 1/10
45/4 or 11 1/4
When dividing fractions, you are changing ________ into ___________.
division into multiplication
5/12 * 9
15/4 or 3 3/4
2 7/8
23/8
45/11
4 1/11
3 1/4 -: 1 1/2
13/6 or 2 1/6
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
5 6/20
106/20
51/8
6 3/8
3 1/2 -: 5 2/3
21/34