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Delaware State Assessments · DeSSA · Math · Grade 8

Delaware Grade 8 DeSSA Math Practice Test

Build Grade 8 Delaware DeSSA Math readiness with five focused 10-question practice sets covering rational numbers, algebra, functions, geometry, statistics, probability, and problem solving.

Grade 8 DeSSA Math practice sets

This Delaware Grade 8 DeSSA Math Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets cover rational numbers, expressions, equations, functions, geometry, measurement, statistics, probability, and integrated problem solving.

Skills covered

  • Rational numbers, exponent rules, square roots, scientific notation, equivalent expressions, equations, inequalities, ratios, and unit rates
  • Function evaluation, slope, linear equations, intercepts, systems, graphs, relations, proportional functions, and comparing representations
  • Angle relationships, triangles, the Pythagorean theorem, volume, similarity, circles, trapezoids, transformations, parallel lines, and distance
  • Mean, median, range, sampling, probability, associations, interquartile range, graph scales, and outliers
  • Grade 8 review tasks combining decimals, percent change, function machines, perimeter, probability, residuals, sequences, volume, and representative samples

How to use this page

Complete one 10-question set at a time. Write down the operation or representation you used, check units and signs, and review the explanation after each response.

This is supplemental State Test Practice, State Assessment Practice, and Standardized Test Practice. It does not replace current Delaware Department of Education guidance, official DeSSA materials, accommodations, or testing policies.

For the Delaware assessment hub, visit Delaware State Assessments.

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4. Test

Delaware Grade 8 DeSSA Math Practice Questions

A 10-question Delaware Grade 8 DeSSA Math practice set on statistics and probability, with answers and explanations.

Read each problem carefully, choose one answer, and review the explanation after responding.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What is the mean of 4, 6, 8, and 10?

Please select an answer first.

Correct answer: A

The correct answer is 7.

  1. Identify the structure: Read the quantities, relationships, diagram information, table, or equation before choosing an operation.
  2. Show the reasoning: Add the values to get 28 and divide by 4, giving a mean of 7.
  3. Check the result: Confirm that the answer is reasonable and matches the Delaware Grade 8 DeSSA Math task.

Add the values to get 28 and divide by 4, giving a mean of 7.

2. QuestionMultiple choice

What is the median of 3, 7, 8, 12, and 15?

Please select an answer first.

Correct answer: B

The correct answer is 7.

  1. Identify the structure: Read the quantities, relationships, diagram information, table, or equation before choosing an operation.
  2. Show the reasoning: The values are already ordered, and the middle value is 8.
  3. Check the result: Confirm that the answer is reasonable and matches the Delaware Grade 8 DeSSA Math task.

The values are already ordered, and the middle value is 8.

3. QuestionMultiple choice

What is the range of the data set 4, 9, 12, and 18?

Please select an answer first.

Correct answer: C

The correct answer is 10.

  1. Identify the structure: Read the quantities, relationships, diagram information, table, or equation before choosing an operation.
  2. Show the reasoning: Subtract the smallest value from the largest: 18 minus 4 equals 14.
  3. Check the result: Confirm that the answer is reasonable and matches the Delaware Grade 8 DeSSA Math task.

Subtract the smallest value from the largest: 18 minus 4 equals 14.

4. QuestionMultiple choice

A school surveys every fifth student entering the cafeteria. What type of sample is this?

Please select an answer first.

Correct answer: D

The correct answer is Convenience sample.

  1. Identify the structure: Read the quantities, relationships, diagram information, table, or equation before choosing an operation.
  2. Show the reasoning: Selecting every fifth student follows a fixed interval, which is systematic sampling.
  3. Check the result: Confirm that the answer is reasonable and matches the Delaware Grade 8 DeSSA Math task.

Selecting every fifth student follows a fixed interval, which is systematic sampling.

5. QuestionMultiple choice

A bag contains 3 red, 5 blue, and 2 green tiles. What is the probability of selecting a red tile?

Please select an answer first.

Correct answer: A

The correct answer is 3 over 10.

  1. Identify the structure: Read the quantities, relationships, diagram information, table, or equation before choosing an operation.
  2. Show the reasoning: There are 10 tiles total and 3 are red, so the probability is 3 over 10.
  3. Check the result: Confirm that the answer is reasonable and matches the Delaware Grade 8 DeSSA Math task.

There are 10 tiles total and 3 are red, so the probability is 3 over 10.

6. QuestionMultiple choice

A fair coin is tossed twice. What is the probability of getting exactly one head?

Please select an answer first.

Correct answer: B

The correct answer is 1 over 4.

  1. Identify the structure: Read the quantities, relationships, diagram information, table, or equation before choosing an operation.
  2. Show the reasoning: The outcomes are HH, HT, TH, and TT; two of four have exactly one head, so the probability is one half.
  3. Check the result: Confirm that the answer is reasonable and matches the Delaware Grade 8 DeSSA Math task.

The outcomes are HH, HT, TH, and TT; two of four have exactly one head, so the probability is one half.

7. QuestionMultiple choice

A scatter plot shows that test scores generally rise as study hours increase. What type of association is shown?

Please select an answer first.

Correct answer: C

The correct answer is Negative association.

  1. Identify the structure: Read the quantities, relationships, diagram information, table, or equation before choosing an operation.
  2. Show the reasoning: When one variable tends to increase as the other increases, the association is positive.
  3. Check the result: Confirm that the answer is reasonable and matches the Delaware Grade 8 DeSSA Math task.

When one variable tends to increase as the other increases, the association is positive.

8. QuestionMultiple choice

A data set has a first quartile of 18 and a third quartile of 31. What is the interquartile range?

Please select an answer first.

Correct answer: D

The correct answer is 13.

  1. Identify the structure: Read the quantities, relationships, diagram information, table, or equation before choosing an operation.
  2. Show the reasoning: The interquartile range is Q3 minus Q1: 31 minus 18 equals 13.
  3. Check the result: Confirm that the answer is reasonable and matches the Delaware Grade 8 DeSSA Math task.

The interquartile range is Q3 minus Q1: 31 minus 18 equals 13.

9. QuestionMultiple choice

Why can a graph with a vertical axis beginning at 90 make small differences look large?

Please select an answer first.

Correct answer: A

The correct answer is It uses a truncated axis that exaggerates visual changes..

  1. Identify the structure: Read the quantities, relationships, diagram information, table, or equation before choosing an operation.
  2. Show the reasoning: Removing the lower part of the axis can make modest differences occupy more of the visual space.
  3. Check the result: Confirm that the answer is reasonable and matches the Delaware Grade 8 DeSSA Math task.

Removing the lower part of the axis can make modest differences occupy more of the visual space.

10. QuestionMultiple choice

A data set includes one extremely high outlier. Which measure of center is usually more resistant to that outlier?

Please select an answer first.

Correct answer: B

The correct answer is Mean.

  1. Identify the structure: Read the quantities, relationships, diagram information, table, or equation before choosing an operation.
  2. Show the reasoning: The median depends on position and is less affected by an extreme value than the mean.
  3. Check the result: Confirm that the answer is reasonable and matches the Delaware Grade 8 DeSSA Math task.

The median depends on position and is less affected by an extreme value than the mean.

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Frequently asked questions about Delaware Grade 8 DeSSA Math Practice

Which grade is covered?

This page is organized for Grade 8 Delaware DeSSA Math practice, with algebra, functions, geometry, statistics, probability, and problem-solving tasks.

How many questions are included?

There are five practice sets with 10 questions each, for 50 questions in total. Each set can be completed separately.

Are these official DeSSA questions?

No. These are original supplemental practice questions. Check the latest Delaware Department of Education and official DeSSA information for current materials, accommodations, and policies.