Rational Numbers +, -, x, / 10/25/09 Algebra 1.1 Bitsy Griffin

Essential question: What important facts do I need to know about fractions? How do I order fractions? How do I add, subtract, multiply, or divide numbers on the calculator? 10/25/09 Algebra 1.1 Bitsy Griffin

What important facts do I need to know about fractions?

How do I order fractions?

How do I add, subtract, multiply, or divide numbers on the calculator?

Vocabulary to Define Real Numbers Rational Numbers Irrational Numbers Reciprocal 10/25/09 Algebra 1.1 Bitsy Griffin

Real Numbers

Rational Numbers

Irrational Numbers

Reciprocal

Rational Numbers Any number that can be written as a ratio Examples: 5/9 -2 .75 -√9 10/25/09 Algebra 1.1 Bitsy Griffin

Any number that can be written as a ratio

Examples:

5/9

-2

.75

-√9

Writing Fractions 0/# is ok #/0 NOT ok Undefined 10/25/09 Algebra 1.1 Bitsy Griffin

0/# is ok

#/0 NOT ok

Undefined

Reciprocal Multiplicative inverse Flip Product of reciprocals is 1 What’s the reciprocal of? 3/5 x ? = 1 10/25/09 Algebra 1.1 Bitsy Griffin

Multiplicative inverse

Flip

Product of reciprocals is 1

What’s the reciprocal of?

3/5 x ? = 1

Ordering Rational Numbers 4 ¾ 3 2/9 3.11 Find decimal equivalents 4.75 3.22 3.11 Put the original #s in order 3.11 3 2/9 4 3/4 10/25/09 Algebra 1.1 Bitsy Griffin

4 ¾ 3 2/9 3.11

Find decimal equivalents

4.75 3.22 3.11

Put the original #s in order

3.11 3 2/9 4 3/4

Calc Tips -> + Mixed #s When you have a fraction that looks like this: Use the parentheses on your calculator like this: 10/25/09 Algebra 1.1 Bitsy Griffin

When you have a fraction that looks like this:

Use the parentheses on your calculator like this:

Calc Tips -> - Mixed #s When you have a fraction that looks like this: Use the parentheses on your calculator like this: 10/25/09 Algebra 1.1 Bitsy Griffin

When you have a fraction that looks like this:

Use the parentheses on your calculator like this:

Essential question: What important facts do I need to know about fractions? How do I order fractions? How do I add, subtract, multiply, or divide numbers on the calculator? 10/25/09 Algebra 1.1 Bitsy Griffin

What important facts do I need to know about fractions?

How do I order fractions?

How do I add, subtract, multiply, or divide numbers on the calculator?