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Eighth Grade (Grade 8) Arithmetic and Number Concepts Questions

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Grade 8 Scientific Notation CCSS: 8.EE.A.4
What is 1,284,320 written in scientific notation?
  1. 1.28×105
  2. 1.28×106
  3. 1.28×10-6
  4. 1.28×10-5
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
All real numbers are rational.
  1. True
  2. False
Grade 8 Systems of Equations CCSS: 8.EE.C.8, 8.EE.C.8b
What is the solution to y=-2x+2 and y=2x+14?
  1. (2,14)
  2. (2,2)
  3. (-3,8)
  4. No solution
Grade 8 Systems of Equations CCSS: 8.EE.C.8, 8.EE.C.8b
The lines y+x=2x-6 and y-x=-6 have
  1. no solutions.
  2. 1 solution.
  3. infinitely many solutions.
  4. 2 solutions.
Grade 8 Systems of Equations CCSS: 8.EE.C.8, 8.EE.C.8b
The lines y=2x+5 and 3y-2x=2y+5 have
  1. no solutions.
  2. 1 solution.
  3. infinitely many solutions.
  4. 2 solutions.
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.2
Choose the best answer.

√39 is between which two numbers?
  1. 9 and 10
  2. 8 and 9
  3. 7 and 8
  4. 6 and 7
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Which correctly expresses the number below in SCIENTIFIC NOTATION?

4,070,000
  1. 4.7×107
  2. 4.07×106
  3. 4.07×105
  4. 4.07×104
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
π and 2.789625343... are examples of irrational numbers.
  1. True
  2. False
Grade 8 Scientific Notation CCSS: 8.EE.A.3
Which of the following is a true statement?
  1. 7×105>6×108
  2. 7×108>4×107
  3. 5×103>3×109
  4. 5×103>5×105
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 Scientific Notation CCSS: 8.EE.A.4
What is 5,438,623,891 written in scientific notation?
  1. 5.44×109
  2. 5.43×109
  3. 8.91×102
  4. 4.38×108
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Convert to scientific notation.

731,000
  1. 7.31×105
  2. 7.31×106
  3. 7.31×102
  4. None of the above
Grade 8 Systems of Equations CCSS: 8.EE.C.8, 8.EE.C.8b
What is the solution to y=-x and y=x+2?
  1. (-1,1)
  2. (-2,2)
  3. (1,-1)
  4. No solution
Grade 8 Systems of Equations CCSS: 8.EE.C.8, 8.EE.C.8b
What is the solution to y=2x-2 and y=x+4?
  1. (2,2)
  2. (6,10)
  3. (-6,-10)
  4. No solution
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Convert to scientific notation.

321.45
  1. 3.2145×102
  2. 3.2145×106
  3. 3.2145×108
  4. None of the above
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Convert to scientific notation.

0.00018
  1. 1.8×10-5
  2. 1.8×10-4
  3. 1.8×10-9
  4. None of the above
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Which of these numbers is not irrational?
  1. √29
  2. √15
  3. √43
  4. 7√4
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