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California CAASPP · Grade 8 · Math

California Grade 8 CAASPP Math Practice Test

Build Grade 8 California CAASPP Math readiness with five focused 10-question practice sets covering number systems, algebra, functions, geometry, statistics, probability, and modeling.

Grade 8 CAASPP Math practice sets

This California Grade 8 CAASPP Math Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets support supplemental review across proportional relationships, rational and irrational numbers, expressions, equations, functions, geometry, statistics, probability, and mathematical modeling.

Math skills covered

  • Proportional relationships, unit rates, irrational numbers, square-root estimates, exponents, scientific notation, rational numbers, and percent change
  • Equivalent expressions, linear equations, equations with different solution sets, functions, slope, inequalities, linear models, and systems
  • Transformations, angle relationships, Pythagorean theorem, circles, volume, surface area, and coordinate geometry
  • Samples, populations, measures of center, variability, probability, compound events, scatter plots, and two-way data
  • Multi-step equations, percent models, scale models, area and volume models, and reasonableness checks

How to use this page

Complete one 10-question set at a time. Show intermediate steps, check signs and units, and review the explanation for every missed or guessed answer.

This is supplemental State Test Practice, State Assessment Practice, and Standardized Test Practice. It does not replace current California Department of Education guidance, official CAASPP blueprints, accommodations, or testing schedules.

For the broader California assessment hub, visit California State Assessments.

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5 Tests
1. Test2. Test3. Test4. Test5. Test

4. Test

California Grade 8 CAASPP Math Practice Questions

A 10-question California Grade 8 CAASPP Math practice set on statistics, probability, and data, with answers and explanations.

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

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

A data set has values 4, 7, 8, 10, and 16. What is the mean?

Please select an answer first.

Correct answer: A

The correct answer is 9.

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: The sum is 45, and 45 divided by 5 is 9.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

The sum is 45, and 45 divided by 5 is 9.

2. QuestionMultiple choice

A two-way table shows 30 of 50 surveyed students prefer science and also participate in a club. What is the relative frequency for this group?

Please select an answer first.

Correct answer: B

The correct answer is 0.60.

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: Divide the joint frequency by the total: 30 ÷ 50 = 0.60.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

Divide the joint frequency by the total: 30 ÷ 50 = 0.60.

3. QuestionMultiple choice

A fair number cube is rolled. What is the probability of rolling an even number or a 5?

Please select an answer first.

Correct answer: C

The correct answer is 1/2.

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: The favorable outcomes are 2, 4, and 5: 3 out of 6, which is 1/2.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

The favorable outcomes are 2, 4, and 5: 3 out of 6, which is 1/2.

4. QuestionMultiple choice

A scatter plot shows points that decrease from left to right. What type of association is shown?

Please select an answer first.

Correct answer: D

The correct answer is Negative association.

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: As the x-values increase, the y-values generally decrease, indicating a negative association.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

As the x-values increase, the y-values generally decrease, indicating a negative association.

5. QuestionMultiple choice

A sample of 100 voters includes 58 who support a proposal. Which statement is a reasonable estimate?

Please select an answer first.

Correct answer: A

The correct answer is About 58 percent of the population may support the proposal..

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: A representative sample can estimate a population percentage, but it cannot prove an exact count or outcome.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

A representative sample can estimate a population percentage, but it cannot prove an exact count or outcome.

6. QuestionMultiple choice

A data set has a first quartile of 12 and a third quartile of 27. What is the interquartile range?

Please select an answer first.

Correct answer: B

The correct answer is 15.

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: The interquartile range is Q3 − Q1 = 27 − 12 = 15.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

The interquartile range is Q3 − Q1 = 27 − 12 = 15.

7. QuestionMultiple choice

A spinner has 10 equal sections, 4 red and 6 blue. It is spun twice. What is the probability of red both times?

Please select an answer first.

Correct answer: C

The correct answer is 4/25.

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: The probability is 4/10 × 4/10 = 16/100 = 4/25.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

The probability is 4/10 × 4/10 = 16/100 = 4/25.

8. QuestionMultiple choice

Which measure is least affected by one extremely large value?

Please select an answer first.

Correct answer: D

The correct answer is Median.

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: The median depends on the middle position and is less affected by an extreme value than the mean or range.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

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

9. QuestionMultiple choice

A line of best fit is y = 2x + 5. What does the slope 2 represent in context?

Please select an answer first.

Correct answer: A

The correct answer is The predicted y-value increases by 2 for each one-unit increase in x..

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: The slope describes the predicted rate of change in y for a one-unit increase in x.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

The slope describes the predicted rate of change in y for a one-unit increase in x.

10. QuestionMultiple choice

A survey asks only students who visit the gym after school about exercise facilities. What concern does this create?

Please select an answer first.

Correct answer: B

The correct answer is The sample may be biased toward students who already use the gym..

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: Students who already visit the gym may have different views from students who do not, creating selection bias.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

Students who already visit the gym may have different views from students who do not, creating selection bias.

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Frequently asked questions about California Grade 8 CAASPP Math Practice Test

Which Math skills are covered?

The page covers number systems, proportional relationships, algebra, functions, equations, inequalities, geometry, statistics, probability, and modeling for Grade 8.

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 CAASPP questions?

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