STAAR Grade 8 Math

Free STAAR Grade 8 Math Practice Questions

10 sample questions for the STAAR Grade 8 Math, with the correct answer and an explanation for each. No account needed. Try each one before you open the answer.

Sections covered on the exam: Number and Operations, Proportionality, Expressions, Equations, and Relationships, Two-Dimensional Shapes, Measurement and Data, Personal Financial Literacy.

Question 1 · Number and Operations
Which number is the greatest?
- A.−5
- B.−1
- C.0
- D.−3
Show answer and explanation
Answer: C. 0
Zero is greater than any negative number. Among the given choices, 0 is the greatest value.
Question 2 · Proportionality
Which equation represents a proportional relationship where y is 4 times x?
- A.y = x + 4
- B.y = 4 + x
- C.y = x ÷ 4
- D.y = 4x
Show answer and explanation
Answer: D. y = 4x
In a proportional relationship, y = kx. Here, the constant of proportionality is 4, so y = 4x.
Question 3 · Expressions, Equations, and Relationships
What is the solution to the equation 5x + 10 = 35?
- A.x = 3
- B.x = 9
- C.x = 7
- D.x = 5
Show answer and explanation
Answer: D. x = 5
Subtract 10 from both sides, then divide by 5. 5x = 25 → x = 5.
Question 4 · Two-Dimensional Shapes
Which angle relationship is formed by two intersecting lines?
- A.Parallel angles
- B.Vertical angles
- C.Complementary angles
- D.Corresponding angles
Show answer and explanation
Answer: B. Vertical angles
Vertical angles are formed by two intersecting lines and are equal in measure.
Question 5 · Personal Financial Literacy
Say “Continue with Practice Test 1 – Section 6: Personal Financial Literacy (Questions 81–100)” when ready.
Maria earns $12 per hour. How much will she earn in 8 hours?
- A.$96
- B.$84
- C.$88
- D.$80
Show answer and explanation
Answer: A. $96
Multiply hourly rate by hours worked. 12 × 8 = 96 dollars.
Question 6 · Number and Operations
Practice Test 1 is now complete with 100 questions distributed across all 6 sections.
Which number is least?
- A.0
- B.−3
- C.−8
- D.−1
Show answer and explanation
Answer: C. −8
The least number is the most negative. Among the choices, −8 is the smallest value.
Question 7 · Proportionality
Which equation represents a proportional relationship with constant of proportionality 6?
- A.y = 6 + x
- B.y = 6x
- C.y = x − 6
- D.y = x ÷ 6
Show answer and explanation
Answer: B. y = 6x
A proportional relationship is written as y = kx. Here k = 6.
Question 8 · Expressions, Equations, and Relationships
What is the solution to 6x − 4 = 20?
- A.x = 3
- B.x = 4
- C.x = 5
- D.x = 6
Show answer and explanation
Answer: B. x = 4
Add 4 to both sides. 6x = 24 Divide by 6. x = 4.
Question 9 · Two-Dimensional Shapes
If a line is reflected across the x-axis, what changes?
- A.The x-coordinate signs change
- B.The y-coordinate signs change
- C.Both coordinates change
- D.Neither coordinate changes
Show answer and explanation
Answer: B. The y-coordinate signs change
Reflection across the x-axis changes the sign of the y-coordinate.
Question 10 · Personal Financial Literacy
“Continue with Practice Test 2 – Section 6: Personal Financial Literacy (Questions 181–200)”
Jamal earns $15 per hour. How much will he earn in 12 hours?
- A.$180
- B.$160
- C.$170
- D.$150
Show answer and explanation
Answer: A. $180
Multiply hourly rate by hours worked. 15 × 12 = 180 dollars.

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