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Rational Number

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 .

Ex press in decimal form:

Claim: Every rational number can be expressed
as a terminating or repeating decimal.

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