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Eighth Grade (Grade 8) Arithmetic and Number Concepts Questions

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Grade 8 Rational and Irrational Numbers
Grade 8 Proportional Relationships
Grade 8 Scientific Notation
Grade 8 Percents
Convert 78.9% to a decimal
  1. 0.0000789
  2. 0.00789
  3. 0.789
  4. 0.0000000000789
Grade 8 Scientific Notation
Grade 8 Scientific Notation
Which of the following numbers is not written in scientific notation?
  1. [math]8.6 xx 10^4[/math]
  2. [math]2.12 xx 10[/math]
  3. [math]22.1 xx 10^(-5)[/math]
  4. [math]9.9132 xx 10^(-1)[/math]
Grade 8 Fractions and Ratios
Which fraction is equivalent to 3.8?
  1. [math]5/18[/math]
  2. [math]19/5[/math]
  3. [math]12/15[/math]
  4. [math]12/5[/math]
Grade 8 Scientific Notation
Convert to scientific notation.

731,000
  1. [math]7.31xx10^5[/math]
  2. [math]7.31xx10^6[/math]
  3. [math]7.31xx10^2[/math]
  4. None of the above
Grade 8 Fractions and Ratios
Multiply.

[math]12/25 * 20/21[/math]
  1. [math]16/ 35[/math]
  2. [math]120/ 425[/math]
  3. [math]10/15[/math]
  4. [math]2/3[/math]
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 number that continues on forever with no pattern
  3. A square root that has finite decimal places
  4. Fractions
Grade 8 Scientific Notation
Convert to scientific notation.

0.00018
  1. [math]1.8xx10^-5[/math]
  2. [math]1.8xx10^-4[/math]
  3. [math]1.8xx10^-9[/math]
  4. None of the above
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