

8.NS.1, 8.NS.2 Rational/Irrational Numbers
Presentation
•
Mathematics
•
8th - 9th Grade
•
Hard
Standards-aligned
Mei-Ling Murray
Used 110+ times
FREE Resource
5 Slides • 6 Questions
1
Rational/Irrational Numbers
8.NS.1, 8.NS.2

2
Converting decimals to fractions
Every terminating decimal can be written as a fraction. Write the decimal number over the place value and simplify.
Every repeating decimal can be written as a fraction using the algebraic method (see your notes).
3
Multiple Choice
Which of these is equivalent to 0.18181818...?
112
92
509
181
4
Convert a fraction to a decimal
Divide the numerator by the denominator
5
Multiple Choice
Which decimal number is equivalent to
2730.1
0.12121212...
9
0.1111...
6
Rational Numbers
Can be written as fractions
Repeating decimals (5.23232323...)
Terminating decimals (5.23)
25 = 5
Whole numbers
Mixed numbers, improper fractions ( 3 21 or 27 )
7
Irrational Numbers
Cannot be written as fractions
Nonrepeating, nonterminating decimals
π
5
631 or the cube root of 6
8
Multiple Select
Select all the irrational numbers.
74
30
421
π
−27
9
Multiple Choice
Which of these statements is correct based on the number line below?
12 is to the right of point B, because it is less than 4.
12 is between points A and B, because it is less than 0 and greater than 4.
12 is between points A and B, because it is greater than 0 and less than 4.
12 is to the right of point B, because it is greater than 4.
10
Multiple Choice
Brett used a calculator to find the decimal expansions of various square roots as shown. According to these expansions, which of the following expressions is the greatest?
3+15
5+6
8−3
10−11
11
Multiple Select
Which of these numbers is between 5 and 10 on a number line? Select all that apply.
6
−81
21
38
44
Rational/Irrational Numbers
8.NS.1, 8.NS.2

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