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Eighth Grade (Grade 8) Arithmetic and Number Concepts Questions

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Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Identify the set of numbers that best describes the situation.

the cost of an item at a store
  1. rational numbers
  2. whole numbers
  3. integers
  4. irrational numbers
Grade 8 Scientific Notation CCSS: 8.EE.A.4
The wavelength of light is 0.000065 meters. What is this value in scientific notation?
  1. 6.5×10-4
  2. 0.65×10-6
  3. 6.5×10-3
  4. 6.5×10-5
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Which of the following numbers is not written in scientific notation?
  1. 8.6×104
  2. 2.12×10
  3. 22.1×10-5
  4. 9.9132×10-1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Which of the following best describes -√3?
  1. whole and irrational
  2. whole and rational
  3. real and irrational
  4. real and rational
Grade 8 Scientific Notation
Write in scientific notation.

42,300
  1. forty-two thousand, three hundred
  2. 4.23×104
  3. .00423
  4. 40,000 + 2,000 + 300
Grade 8 Systems of Equations CCSS: 8.EE.C.8, 8.EE.C.8b
What is the solution to y=2x-12 and y=x-4?
  1. (-12,-4)
  2. (8,4)
  3. (2,1)
  4. No solution
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.2
The value of √99 falls between 9 and 10.
  1. True
  2. False
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.2
The value of √2 falls between 2.4 and 2.5.
  1. True
  2. False
Grade 8 Scientific Notation
What is the number 0.00003007 expressed in scientific notation?
  1. 3.007×105.
  2. 3.7×10-5.
  3. 3.007×10-5.
  4. 3.007×10-4.
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Convert 0.00088 to scientific notation.
  1. 88×10-5
  2. .88×10-3
  3. 8.8×10-4
  4. 8.8×104
Grade 8 Scientific Notation CCSS: 8.EE.A.4
What is 3.2×10-3 written in standard form?
  1. 3,200
  2. 0.0032
  3. 0.032
  4. 320
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Choose the number that is rational.
  1. √4643
  2. √2809400
  3. √346
  4. √33
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Choose the number that is irrational.
  1. 14
  2. √47
  3. 899
  4. 43
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Perform the indicated computation. Give the answer in scientific notation.
(6.1×105)(4×10-9)
  1. 2.44
  2. 2.44×103
  3. 2.44×10-3
  4. 2.44×1014
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Convert to scientific notation.

0.00018
  1. 1.8×10-5
  2. 1.8×10-9
  3. 1.8×10-4
  4. None of the above
Grade 8 Scientific Notation CCSS: 8.EE.A.3
The Moon is about 2.26×105 miles from Earth. What is this distance in standard form?
  1. 22,600 miles
  2. 226,000 miles
  3. 2,260,000 miles
  4. 22,600,000 miles
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