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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 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
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 Rational and Irrational Numbers CCSS: 8.NS.A.2
[math]pi<3[/math]
  1. True
  2. False
Grade 8 Scientific Notation
Convert 0.00088 to scientific notation.
  1. [math]88 * 10^(-5)[/math]
  2. [math].88 * 10^(-3)[/math]
  3. [math]8.8 * 10^(-4)[/math]
  4. [math]8.8 * 10^4[/math]
Grade 8 Percents
The decimal 0.64 can be written as
  1. 0.64%
  2. 64%
  3. 6.4%
  4. none of the above
Grade 8 Rational and Irrational Numbers CCSS: 8.EE.A.2
[math]sqrt2[/math] is what type of number?
  1. integer
  2. irrational
  3. rational
  4. whole
Grade 8 Fractions and Ratios
[math]4/5 -: 3/8[/math]
  1. 3/10
  2. 32/15
  3. 12/8
  4. 10/3
Grade 8 Fractions and Ratios
Grade 8 Positive and Negative Numbers
Grade 8 Percents
Grade 8 Fractions and Ratios
In his race, Speedy McGoo ran the 400 meter dash in 14.5 seconds. What is his speed in meters per second?
  1. .03625 meters per second
  2. 10 meters per second
  3. 27.59 meters per second
  4. 25 meters per second
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.2
Choose the best answer.

[math]sqrt(84)[/math] is between
  1. 10 and 11
  2. 9 and 10
  3. 8 and 9
  4. 7 and 8
Grade 8 Fractions and Ratios
[math]8/35 xx 15/16[/math]
  1. 1/2
  2. 3/14
  3. 3/16
  4. 5/14
Grade 8 Fractions and Ratios
Find the reciprocal of [math]x/3[/math].
  1. [math]3/x[/math]
  2. [math]x/1[/math]
  3. [math]1/x[/math]
  4. [math](1n)/3[/math]
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