Agenda:
-Return & review quiz 5
-Begin Chapter 6 ( Rational Numbers )
-Today: Sec. 6.1
-Tomorrow: Sec. 6.2
Homework, Sec. 6.1:
1, 2, 3, 4, 7, 13, 14
Estimate: 15 -16, 17 -18
19, 20, 24, 26, 27
Sec. 6.1 Rational Number Ideas
We commonly refer to situations like :
1/4 of a pizza...
3/4 of Americans surveyed...
15% of college students...
These are examples of rational numbers , which are
simply quotients a / b of two integers , where b ≠ 0.
When you think of rational numbers , you should
think of a part & a whole.
Shade the given fraction of the whole .
The fraction is shown . What is the whole?
Equivalent fractions
Example:
1. Use the Fundamental Law of Fractions (if
possible) to change each rational number into
decimal form .
2. Estimate the location of each of the fractions
above on the number line .
Fractions and Decimals
a) The number 12.76 is a rational number... why?
b) Write 12.76 in expanded notation .
Express in decimal form :
Claim: Every rational number can be expressed
as a terminating or repeating decimal.
