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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
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. $9.9132 xx 10^(-1)$
Multiply.

$12/25 * 20/21$
1. $16/ 35$
2. $120/ 425$
3. $10/15$
4. $2/3$
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
$pi<3$
1. True
2. False
Convert 0.00088 to scientific notation.
1. $88 * 10^(-5)$
2. $.88 * 10^(-3)$
3. $8.8 * 10^(-4)$
4. $8.8 * 10^4$
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
$sqrt2$ is what type of number?
1. integer
2. irrational
3. rational
4. whole
$4/5 -: 3/8$
1. 3/10
2. 32/15
3. 12/8
4. 10/3
Grade 8 Positive and Negative Numbers
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

$sqrt(84)$ is between
1. 10 and 11
2. 9 and 10
3. 8 and 9
4. 7 and 8
$8/35 xx 15/16$
Find the reciprocal of $x/3$.
1. $3/x$
2. $x/1$
3. $1/x$
4. $(1n)/3$