1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
Homework Questions?
Aug 26­12:49 PM
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1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
1.2 Irrational Numbers and Square Roots
Objective: Be able to find and estimate square roots and to
classify numbers as rational or irrational.
Vocabulary:
Perfect Square: A number that is the square of a whole number.
example: 42=16 16 is a perfect square
Square Root: the square root of a number is another number when multiplied by itself is equal to the given number
example: √36 = 6 because 62=36
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1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
Common Perfect Squares
These should be memorized...
12 =
52 =
92 =
22=
6 2=
102=
32=
7 2=
112=
42=
8 2=
122=
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1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
Is there another number squared that also equals 16?
Whenever you see the √ in the text book it means the positive
square root, unless stated otherwise.
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1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
Find both the square roots of each number.
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1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
Find both the square roots of each number.
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1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
You can estimate the value of square roots when you don't have a calculator.
Estimate the value of ­5
­4
­3
­2
­1
0
1
2
3
4
5
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1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
Estimate the value of each square root
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1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
Which is greater, √18 or 4.4?
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1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
Which is greater, √24 or 4.6?
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1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
Irrational Numbers: numbers that cannot be written in fractional form. They are non terminating, non repeating decimals.
examples: π, 1.1234567....., -3.25485325..
real numbers
Irrational Numbers
Rational Numbers
(Integers, Fractions, Terminating and
repeating decimals)
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1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
Classify each number as rational or irrational. Explain.
1.) ­9.3
2.) 3.)
4.) 6.363663666...
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1.2 Irrational Numbers and Square roots Day 1.notebook
September 08, 2014
Homework:
Pg. 12 #'s 5 ­ 21, 26 ­ 29
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