2.1 rational numbers
DESCRIPTION
2.1 Comparing and Ordering Rational Numbers Lesson September 11 and 12 2014TRANSCRIPT
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2.1 Rational Numbers
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September 12, 2014
We organize numbers into sets by properties...
Number Sense2.1. Comparing Rational Numbers
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Natural Numbers
The positive counting numbers excluding
zero 1
2
17
13
123
617
36
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Whole Numbers
The positive counting numbers
including zero
0
1
45
232
17
5
56799
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Integers
Positive and negative whole
numbers including zero
-3
-2 -1
0
1
2
3
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Rational Numbers
Includes fractions, regular counting numbers, negative numbers,
terminating decimals and repeating decimals.
03
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Irrational Numbers
An irrational number is a number whose
decimal part goes on forever and ever without repeating.
e
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Irrational
Rational
Integers
Whole
Natural
Irrational
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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
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2.1 Rational Numbers
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Rational
Integers
Whole
Natural
Irrational
Integers
Real Number Target
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Comparing Rationals
Is 45 or 2
3greater?
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Comparing Rationals
Is 45 or 2
3greater?
2. Use equivalent fractions...
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Question: How much pizza would you rather have...
12
of the pizza?
24 of the pizza?
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Equivalent Fractions
It's the same!
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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...
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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...
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Equivalent Fractions
Find the missing number to make the fractions equivalent.
27
?35=
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Equivalent Fractions
Find the missing number to make the fractions equivalent.
6?
3648=
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Comparing Rationals
Is 45 or 2
3greater?
2. Use equivalent fractions...
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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
1 10