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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

3. Test

California Grade 8 CAASPP Math Practice Questions

A 10-question California Grade 8 CAASPP Math practice set on geometry and transformations, 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 point (-2, 5) is reflected across the x-axis. What are the new coordinates?

Please select an answer first.

Correct answer: A

The correct answer is (-2, -5).

  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 reflection across the x-axis changes the sign of y and keeps x unchanged.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

A reflection across the x-axis changes the sign of y and keeps x unchanged.

2. QuestionMultiple choice

Two similar triangles have corresponding side lengths in a ratio of 2:5. If a side of the smaller triangle is 8 units, what is the corresponding side of the larger triangle?

Please select an answer first.

Correct answer: B

The correct answer is 20 units.

  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 scale factor from smaller to larger is 5/2, so 8 × 5/2 = 20 units.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

The scale factor from smaller to larger is 5/2, so 8 × 5/2 = 20 units.

3. QuestionMultiple choice

A right triangle has legs of 9 and 12 units. What is the hypotenuse?

Please select an answer first.

Correct answer: C

The correct answer is 15 units.

  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 square root of 9² + 12² is the square root of 225, which is 15.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

The square root of 9² + 12² is the square root of 225, which is 15.

4. QuestionMultiple choice

A circle has a diameter of 10 meters. Which expression represents its circumference?

Please select an answer first.

Correct answer: D

The correct answer is 10π meters.

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: Circumference equals π times the diameter, so it is 10π meters.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

Circumference equals π times the diameter, so it is 10π meters.

5. QuestionMultiple choice

A cylinder has radius 4 centimeters and height 6 centimeters. What is its volume?

Please select an answer first.

Correct answer: A

The correct answer is 96π cubic centimeters.

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: Cylinder volume is πr²h = π × 4² × 6 = 96π cubic centimeters.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

Cylinder volume is πr²h = π × 4² × 6 = 96π cubic centimeters.

6. QuestionMultiple choice

A scale drawing uses 1 centimeter for every 2.5 meters. A building is 20 meters wide. How wide is it in the drawing?

Please select an answer first.

Correct answer: B

The correct answer is 8 centimeters.

  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 real width by the scale: 20 ÷ 2.5 = 8 centimeters.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

Divide the real width by the scale: 20 ÷ 2.5 = 8 centimeters.

7. QuestionMultiple choice

A rectangular prism is 3 feet long, 2 feet wide, and 4 feet high. What is its surface area?

Please select an answer first.

Correct answer: C

The correct answer is 52 square feet.

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: Surface area is 2(lw + lh + wh) = 2(6 + 12 + 8) = 52 square feet.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

Surface area is 2(lw + lh + wh) = 2(6 + 12 + 8) = 52 square feet.

8. QuestionMultiple choice

Which transformation maps every point to the point on the opposite side of the origin at the same distance?

Please select an answer first.

Correct answer: D

The correct answer is A 180-degree rotation about the origin..

  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 180-degree rotation sends (x, y) to (-x, -y), preserving distance from the origin.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

A 180-degree rotation sends (x, y) to (-x, -y), preserving distance from the origin.

9. QuestionMultiple choice

A cone has radius 3 units and height 12 units. What is its volume?

Please select an answer first.

Correct answer: A

The correct answer is 36π cubic units.

  1. Identify the task: Decide whether the question asks about number systems, expressions, equations, functions, geometry, data, probability, or modeling.
  2. Use the quantities: Cone volume is one-third πr²h = one-third × π × 9 × 12 = 36π cubic units.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

Cone volume is one-third πr²h = one-third × π × 9 × 12 = 36π cubic units.

10. QuestionMultiple choice

A polygon has 10 sides. What is the sum of its interior angles?

Please select an answer first.

Correct answer: B

The correct answer is 1,440 degrees.

  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 (10 − 2) × 180 = 1,440 degrees.
  3. Check the result: Review signs, units, operations, and whether the answer is reasonable in the situation.

The sum is (10 − 2) × 180 = 1,440 degrees.

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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.