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You can create printable tests and worksheets from these Grade 8 Arithmetic and Number Concepts questions! Select one or more questions using the checkboxes above each question. Then click the add selected questions to a test button before moving to another page.

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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. $8.3 xx 10^3$
2. $8.3 xx 10^4$
3. $8.3 xx 10 ^-3$
4. $8.3$
Grade 8 Scientific Notation CCSS: 8.EE.A.3
Which of the following is least?
1. $5xx10^-2$
2. $5xx10^-1$
3. $5xx10^1$
4. $5xx10^2$
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Choose the number that is irrational.
1. $21/99$
2. $sqrt100$
3. $sqrt(36/3$
4. $2/94$
If $m/p =2/3$, what can you conclude?
1. $3m=2p$
2. $2m=3p$
3. $mp=6$
4. $m+p=5$
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.2
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. $6.5xx10^-4$
2. $0.65xx10^-6$
3. $6.5xx10^-3$
4. $6.5xx10^-5$
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Express $3910.28 xx 10^4$ using proper scientific notation.
1. $3.91028 xx10^6$
2. $3.91028 xx10^8$
3. $3.91028 xx10^7$
4. $39.1028xx10^5$
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Choose the number that is irrational.
1. $sqrt123$
2. $88/41$
3. $sqrt49$
4. $23/69$
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Which of the following best describes $- sqrt3$?
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.2
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Grade 8 Scientific Notation CCSS: 8.EE.A.3
Grade 8 Scientific Notation CCSS: 8.EE.A.4
Which of the following numbers is not written in scientific notation?
1. $8.6 xx 10^4$
2. $2.12 xx 10$
3. $22.1 xx 10^(-5)$
4. $9.9132 xx 10^(-1)$
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.

$4^3*4^8$
1. $16^11$
2. $4^24$
3. $16^24$
4. $4^11$
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Square root of 225
1. Rational
2. Irrational
Grade 8 Scientific Notation CCSS: 8.EE.A.4
1. $3.007 xx 10^5$.
2. $3.7 xx 10^-5$.
3. $3.007 xx 10^-5$.
4. $3.007 xx 10^-4$.