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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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What is 0.000062 in scientific notation?
1. $6.2 xx 10^5$
2. $6.2 xx 10^-4$
3. $6.2 xx 10^-5$
4. $6.2 xx 10^4$
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.2
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
150 is what percent of 30 ?
1. 5%
2. 20%
3. 50%
4. 500%
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.2

$sqrt(106)$ is between
1. 10 and 11
2. 9 and 10
3. 11 and 12
4. 8 and 9
Convert the number to scientific notation.

137,000,000
1. $1.37xx10^8$
2. $1.37xx10^3$
3. $1.37xx10^10$
4. None of the Above
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.2
$sqrt(67)$ is between
1. 9 and 9.5
2. 9.5 and 10
3. 8 and 9
4. 7 and 8
Which measurement is the most precise?
1. 567.8 ft
2. 5.67 ft
3. 56.78 ft
4. 5.678 ft
Which measurement is the least precise?
1. 1.123 cm
2. 1.23 cm
3. 1.3 cm
4. 1.234 cm
Grade 8 Rational and Irrational Numbers
Write in scientific notation.

42,300
1. fourty two thousand three hundred
2. $4.23 xx10^4$
3. .00423
4. 40,000 + 2,000 + 300
Convert 78.9% to a decimal
1. 0.0000789
2. 0.00789
3. 0.789
4. 0.0000000000789
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.2
$sqrt(65)/7$ is between