Top 10 8th Grade STAAR Math Practice Questions

1- A rope weighs \(800\) grams per meter of length. What is the weight in kilograms of \(12.2\) meters of this rope? (\(1\) kilogram \(= 1000\) grams)

A. \(0.0976\)

B. \(0.976\)

C. \(9.76\)

D. \(9760\)

2- The ratio of boys to girls in a school is \(3:7\). If there are \(180\) boys in the school, what is the total number of students in the school?_________

3- In the figure below, the two triangles are similar. What is the value of \(x\)?

A. \(7\)

C.

D.

5- In the rectangle below if \(y>5\) cm and the area of a rectangle is 50 cm\(^2\) and the perimeter of the rectangle is 30 cm, what is the value of x and y respectively?

A. \(4, 11\)

B. \(5, 11\)

C. \(5, 10\)

D. \(4, 10\)

6- A football team had $40,000 to spend on supplies. The team spent $22,000 on new balls. New sports shoes cost $240 each. Which of the following inequalities represent how many new shoes the team can purchase.

A. \(240x+22,000 ≤40,000 \)

B. \(240x+22,000 ≥40,000\)

C. \(22,000x+240 ≤40,000\)

D. \(22,000x+240 ≥40,000\)

7- Right triangle ABC has two legs of lengths 6 cm (AB) and 8 cm (AC). What is the length of the third side (BC)?

A. 4 cm

B. 6 cm

C. 8 cm

D. 10 cm

8- If \(3x-5=8.5\), What is the value of \(5x+3\)?

A. 13

B. 15.5

C. 20.5

D. 25.5

9- A bank is offering \(4.5\%\) simple interest on a savings account. If you deposit $8,000, how much interest will you earn in five years?

A. $360

B. $720

C. $1800

D. $3600

10- In a party, 10 soft drinks are required for every 12 guests. If there are 252 guests, how many soft drinks is required?

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A. 21

B. 105

C. 210

D. 2510

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Answers:

2- 600
The ratio of boys to girls is \(3:7\).
Therefore, there are 3 boys out of 10 students. To find the answer, first, divide the number of boys by 3, then multiply the result by 10.
\(180 ÷ 3 = 60 ⇒ 60 × 10 = 600\)

3- C
the population is increased by \(15\%\) and \(20\%\). \(15\%\) increase changes the population to \(115\%\) of the original population.
For the second increase, multiply the result by \(120\%\).
\((1.15) × (1.20) = 1.38 = 138\%\)
38 percent of the population is increased after two years.

4- B
A linear equation is a relationship between two variables, \(x\) and \(y\), that can be put in the form \(y = mx + b\).
A non-proportional linear relationship takes on the form \(y=mx + b\), where \(b ≠ 0\) and its graph is a line that does not cross through the origin.

5- C
The perimeter of the rectangle is: \(2x+2y=30→x+y=15→x=15-y \)
The area of the rectangle is: \(x×y=50→(15-y)(y)=50→y^2-15y+50=0\)
Solve the quadratic equation by factoring method.
\((y-5)(y-10)=0→y=5 \)
(Unacceptable, because y must be greater than 5) or \(y=10\)
If \( y=10 →x×y=50→x×10=50→x=5\)

6- A
Let \(x\) be the number of new shoes the team can purchase. Therefore, the team can purchase \(240 x\).
The team had $40,000 and spent $22,000. Now the team can spend on new shoes $18,000 at most.
Now, write the inequality: \( 120x+22.000 ≤40.000\)

7- D
Use Pythagorean Theorem:
\(a^2 + b^2 = c^2\)
\(6^2 + 8^2 = c^2 ⇒ 100 = c^2 ⇒ c = 10\)

8- D
\(3x-5=8.5→3x=8.5 + 5=13.5→x = \frac{13.5}{3}= 4.5\)
Then;
\(5x+3=5 (4.5)+3=22.5+3=25.5\)

9- C
Use simple interest formula:
\(I=prt\)
\((I = interest, p = principal, r = rate, t = time)\)
\(I=(8000)(0.045)(5)=1800\)

10- C
Let \(x\) be the number of soft drinks for 252 guests. Write the proportion and solve for \(x\).
\(\frac{10 soft drinks}{12 guests}=\frac{x}{252 guests}\)
\(x = \frac{252×10}{12}⇒x=210\)

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For a complete review aligned with these practice questions, Mastering Grade 8 Math (resource currently unavailable) covers every eighth-grade topic with worked examples and plenty of practice. If linear functions, systems, or the Pythagorean Theorem feel shaky, Algebra I for Beginners takes the same ideas further into high-school algebra.

Frequently Asked Questions

What is on the grade 8 STAAR reference sheet?

The grade 8 STAAR mathematics reference materials list formulas for area, circumference, volume of prisms, cylinders, cones and spheres, the Pythagorean theorem, slope-intercept form, and simple and compound interest, along with unit conversions. TEA posts the current sheet online. Students can also use a calculator on grade 8 STAAR math, so practice with both the sheet and a calculator.

Is there a STAAR grade 8 math practice test?

Yes. TEA offers an online STAAR grade 8 mathematics practice assessment, and released tests from past years are posted on its website. These ten questions make a quick diagnostic first. For example, a rope that weighs 800 grams per meter: 12.2 meters weighs 800 × 12.2 = 9,760 grams, which is 9.76 kilograms.

Where can I find an 8th grade math STAAR practice test answer key PDF?

TEA posts answer keys as PDFs next to its released STAAR grade 8 math tests and the practice assessment. Check your work right after finishing, then rework each miss on fresh paper. One that trips students up: if the ratio of boys to girls is 3:7 and there are 180 boys, each part is 60, so the school has 10 × 60 = 600 students.

What is the grade 8 STAAR math test?

Grade 8 STAAR math is Texas’s end-of-year math test for eighth graders, aligned to the grade 8 TEKS and taken online. It covers proportionality, linear equations and functions, the Pythagorean theorem, volume, data and personal financial literacy. Question types include multiple choice, typed number answers and drag-and-drop items, so practicing online helps.

Are there 8th grade STAAR math practice worksheets?

Yes, and the best ones mix STAAR-style word problems with full solutions. Use them for topics your student misses, like writing inequalities. With $40,000 to spend, $22,000 already used on balls and shoes at $240 each, the inequality is 240x + 22,000 ≤ 40,000, so x ≤ 75 pairs of shoes.

Related EffortlessMath Lessons

If a topic on this page feels rusty, these short lessons go deeper:

• How to solve multi-step equations
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