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# Common Core Standard 8.NS.A.1 Questions

Know that numbers that are not rational are called irrational. Understand informally that every number has a decimal expansion; for rational numbers show that the decimal expansion repeats eventually, and convert a decimal expansion which repeats eventually into a rational number.

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Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Choose the number that is irrational.
1. $21/99$
2. $sqrt100$
3. $sqrt(36/3$
4. $2/94$
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Choose the number that is irrational.
1. $sqrt123$
2. $88/41$
3. $sqrt49$
4. $23/69$
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Which of the following can NOT be classified as a rational number?
1. Integers
2. A decimal number that continues on forever with no pattern
3. A square root that has finite decimal places
4. Fractions
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Which of the following best describes $- sqrt3$?
1. whole and irrational
2. whole and rational
3. real and irrational
4. real and rational
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Which number is irrational?
1. 3.7
2. 1/4
3. .25
4. 1.23124125126127...
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Which of these numbers is not irrational?
1. $sqrt29$
2. $sqrt15$
3. $sqrt43$
4. $7/sqrt4$
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Which of the following fractions most closely approximates the value of $pi$?
1. $7/21$
2. $7/22$
3. $21/7$
4. $22/7$
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
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