1. 0-5: Multiply and Dividing Rational Numbers

2. 0-5: Multiplying/Dividing Rational Numbers
The rules about multiplying/dividing integers (covered yesterday) are the same for multiplying/dividing all rational numbers
Multiplying with the same sign yields a positive answer
Multiplying with different signs yields a negative answer
Find each product or quotient
7.2(-0.2)
-1.44
÷ (-10.5)
2.28

3. 0-5: Multiplying/Dividing Rational Numbers
To multiply fractions, multiply numerators with numerators and denominators with denominators.
Reduce when possible
Convert mixed numbers into improper fractions

4. 0-5: Multiplying/Dividing Rational Numbers
Two numbers whose product is 1 are called multiplicative inverses or reciprocals
Simply flip the fraction
Find the reciprocal of each fraction
3/8
8/3
2 4/5
Convert to an improper fraction: 14/5
5/14

5. 0-5: Multiplying/Dividing Rational Numbers
To divide one fraction by another, flip the division into multiplication, and flip the fraction that came after the division sign.
1/3 ÷ 1/2 = 1/3 ● 2/1 = 2/3
3/8 ÷ 2/3
9/16
3/4 ÷ 21/2
3/10
-1/5 ÷ (-3/10)
2/3

6. 0-5: Multiplying/Dividing Rational Numbers
Assignment
Page P19
1 – 41 (odds)