2.1 rational numbers

2.1 Rational Numbers

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We organize numbers into sets by properties...

Number Sense2.1. Comparing Rational Numbers

2.1 Rational Numbers

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Natural Numbers

The positive counting numbers excluding

zero 1

2

17

13

123

617

36

2.1 Rational Numbers

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Whole Numbers

The positive counting numbers

including zero

0

1

45

232

17

5

56799

2.1 Rational Numbers

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Integers

Positive and negative whole

numbers including zero

-3

-2 -1

0

1

2

3

2.1 Rational Numbers

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Rational Numbers

Includes fractions, regular counting numbers, negative numbers,

terminating decimals and repeating decimals.

03

2.1 Rational Numbers

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Irrational Numbers

An irrational number is a number whose

decimal part goes on forever and ever without repeating.

e

2.1 Rational Numbers

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Irrational

Rational

Integers

Whole

Natural

Irrational

2.1 Rational Numbers

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Irrational

Rational

Integers

Whole

Natural

Irrational

Move each number to the inner­most circle that it can be classified as a member of

Real Number Target

30617

1

­2

2.1 Rational Numbers

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Rational

Integers

Whole

Natural

Irrational

Integers

Real Number Target

2.1 Rational Numbers

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Comparing Rationals

Is 45 or  2

3greater?

2.1 Rational Numbers

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2.1 Rational Numbers

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2.1 Rational Numbers

13

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Comparing Rationals

Is 45 or  2

3greater?

2. Use equivalent fractions...

2.1 Rational Numbers

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Question: How much pizza would you rather have... 

12

of the pizza?

24 of the pizza?

2.1 Rational Numbers

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Equivalent Fractions

It's the same!

2.1 Rational Numbers

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Equivalent Fractions

To find equivalent fractions, multiply or divide the top and the bottom by the same number!

35

Let's find some equivalent fractions of...

2.1 Rational Numbers

17

September 12, 2014

Equivalent Fractions

To find equivalent fractions, multiply or divide the top and the bottom by the same number!

50100

Let's find some equivalent fractions of...

2.1 Rational Numbers

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Equivalent Fractions

Find the missing number to make the fractions equivalent.

27

?35=

2.1 Rational Numbers

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Equivalent Fractions

Find the missing number to make the fractions equivalent.

6?

3648=

2.1 Rational Numbers

20

September 12, 2014

Comparing Rationals

Is 45 or  2

3greater?

2. Use equivalent fractions...

2.1 Rational Numbers

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September 12, 2014

Let's order the following rational numbers on a number line.

What are some strategies to help us?

1/2 3/4 1/4 ­4/8 ­2/4 ­0.2 6/8 4/4 ­7/8 1/3

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