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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.2
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Write .0083 in scientific notation.
  1. [math]8.3 xx 10^3[/math]
  2. [math]8.3 xx 10^4 [/math]
  3. [math]8.3 xx 10 ^-3[/math]
  4. [math]8.3[/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.3
Which of the following is least?
  1. [math]5xx10^-2[/math]
  2. [math]5xx10^-1[/math]
  3. [math]5xx10^1[/math]
  4. [math]5xx10^2[/math]
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Choose the number that is irrational.
  1. [math]21/99[/math]
  2. [math]sqrt100[/math]
  3. [math]sqrt(36/3[/math]
  4. [math]2/94[/math]
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.2
Grade 8 Proportional Relationships
If [math]m/p =2/3[/math], what can you conclude?
  1. [math]3m=2p[/math]
  2. [math]2m=3p[/math]
  3. [math]mp=6[/math]
  4. [math]m+p=5[/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Express [math]3910.28 xx 10^4[/math] using proper scientific notation.
  1. [math]3.91028 xx10^6[/math]
  2. [math]3.91028 xx10^8[/math]
  3. [math]3.91028 xx10^7[/math]
  4. [math]39.1028xx10^5[/math]
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. [math]6.5xx10^-4[/math]
  2. [math]0.65xx10^-6[/math]
  3. [math]6.5xx10^-3[/math]
  4. [math]6.5xx10^-5[/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.4
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 Rational and Irrational Numbers CCSS: 8.NS.A.2
Grade 8 Rational and Irrational Numbers CCSS: 8.EE.A.1
Rewrite the expression in simpler form.

[math]4^3*4^8[/math]
  1. [math]16^11[/math]
  2. [math]4^24[/math]
  3. [math]16^24[/math]
  4. [math]4^11[/math]
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.2
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Which of the following best describes [math]- sqrt3[/math]?
  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
Square root of 225
  1. Rational
  2. Irrational
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Choose the number that is irrational.
  1. [math]sqrt123[/math]
  2. [math]88/41[/math]
  3. [math]sqrt49[/math]
  4. [math]23/69[/math]
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Which of these numbers is irrational?
  1. [math]sqrt16[/math]
  2. [math]sqrt99[/math]
  3. [math]13/4[/math]
  4. [math]sqrt225[/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Grade 8 Scientific Notation
What is the number 0.00003007 expressed in scientific notation?
  1. [math]3.007 xx 10^5[/math].
  2. [math]3.7 xx 10^-5[/math].
  3. [math]3.007 xx 10^-5[/math].
  4. [math]3.007 xx 10^-4[/math].
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