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Eighth Grade (Grade 8) Arithmetic and Number Concepts Questions

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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.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 Scientific Notation
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
Express the following number using proper scientific notation: [math]3910.28 xx 10^4[/math]
  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
[math](6.1 xx 10 ^5) (4 xx 10 ^-9)[/math] Perform the indicated computation, write your answer in scientific notation.
  1. [math] 2.44 [/math]
  2. [math]2.44 xx 10 ^ 3[/math]
  3. [math]2.44 xx 10 ^ -3[/math]
  4. [math]2.44 xx 10 ^14[/math]
Grade 8 Scientific Notation
The number 0.00003007 expressed in scientific notation is
  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]
Grade 8 Scientific Notation
How do you express 1,870,000 in scientific notation?
  1. [math]5.49 x 10^-8[/math]
  2. [math]1.87 x 10^-6[/math]
  3. [math]1.87 x 10^6[/math]
  4. [math]187 x 10^6[/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.3
1,284,320 written in scientific notation is
  1. [math]1.28 xx 10^5[/math]
  2. [math]1.28 xx 10^6[/math]
  3. [math]1.28 xx 10^-6[/math]
  4. [math]1.28 xx 10^-5[/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.4
[math](6.9 xx 10^8)/(3 xx 10^5) [/math]

Perform the indicated computations. Write the answers in scientific notation.
  1. [math]2.3 xx 10 ^3[/math]
  2. [math]2.3 xx 10^13[/math]
  3. [math]2.3 xx 10^-3[/math]
  4. [math]2.3 xx 10^4[/math]
Grade 8 Scientific Notation
In the year 2000, Los Angeles, CA had a population of about 3,700,000 people. What is this number in scientific notation?
  1. 3.7 x [math]10^-6[/math]
  2. 3.7 x [math]10^-5[/math]
  3. 3.7 x [math]10^5[/math]
  4. 3.7 x [math]10^6[/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Choose the correct answer.
[math](2.6xx10^3)xx(1.8xx10^9)[/math]
  1. [math] 4.68xx10^3 [/math]
  2. [math] 4.68xx10^12 [/math]
  3. [math] 4.68xx10^6 [/math]
  4. [math] 4.68xx10^9 [/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Choose the correct answer.
[math](8.6xx10^13)/(4.1xx10^3)[/math]
  1. [math] 2.1xx10^-16 [/math]
  2. [math] 2.9xx10^10 [/math]
  3. [math] 2.09xx10^16 [/math]
  4. [math] 2.1xx10^10[/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.3
Choose the correct scientific notation for 245,389,271.
  1. [math]2.45xx10^-8[/math]
  2. [math]2.45xx10^-7[/math]
  3. [math]2.45xx10^7[/math]
  4. [math]2.45xx10^8[/math]
Grade 8 Proportional Relationships
Grade 8 Scientific Notation CCSS: 8.EE.A.3
Choose the correct notation for 700,000.
  1. [math]7xx10^5[/math]
  2. [math]7xx10^8 [/math]
  3. [math]7xx10^3 [/math]
  4. [math]7xx10^4 [/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.3
Choose the correct scientific notation for 540,000,000.
  1. [math]5.4xx10^8[/math]
  2. [math]5.4xx10^-7[/math]
  3. [math]5.4xx10^7[/math]
  4. [math]5.4xx10^9[/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.3
5,438,623,891 written in scientific notation is
  1. [math]5.44 xx 10^9[/math]
  2. [math]5.43 xx 10^9[/math]
  3. [math]8.91 xx 10^2[/math]
  4. [math]4.38 xx 10^8[/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.3
Which of the following is a correct notation for 0.000078?
  1. [math]7.8xx10^-6[/math]
  2. [math]7.8xx10^-5[/math]
  3. [math]7.8xx10^-7[/math]
  4. [math]7.8xx10^-4[/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Choose the correct answer.
[math](2.76xx10^-3)xx(1.93xx10^5)[/math]
  1. [math]5.3xx10^2[/math]
  2. [math]5.3xx10^-2[/math]
  3. [math]5.3xx10^3[/math]
  4. [math]5.3xx10^-3[/math]
Grade 8 Scientific Notation CCSS: 8.EE.A.3
Choose the correct scientific notation for 75,000,000,000.
  1. [math]7.5xx10^7[/math]
  2. [math]7.5xx10^8[/math]
  3. [math]7.5xx10^9[/math]
  4. [math]7.5xx10^10[/math]
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