3rd Grade OST Math FREE Sample Practice Questions
TL;DR: Ohio’s State Test format can be a lot for a 3rd grader who has never seen it. These free sample questions take about 15 to 20 minutes and mirror the actual OST format, with the worked-out answer right below each problem so you can review together at home. Your child gets used to the test’s look and feel, and you get a clear read on which topics still need a study session.
Key takeaways:
- Sample set matches the grade 3 OST Math format: multiple choice, multi-select, drag-and-drop, and short-answer items.
- Coverage spans multiplication and division within 100, fractions on a number line, area, place value, and word problems.
- No calculator at grade 3 – your child works each problem by hand.
- Ohio’s grade 3 standards line up with Common Core grade 3, so any CCSS-aligned prep transfers.
- Proficient (level 3 of 5) is the on-grade-level target schools use.
Preparing your student for the 3rd Grade OST Math test? To succeed on the OST Math test, students need to practice as many real OST Math questions as possible. There’s nothing like working on OST Math sample questions to measure your student’s exam readiness and put him/her more at ease when taking the 3rd Grade OST Math test. The sample math questions you’ll find here are brief samples designed to give students the insights they need to be as prepared as possible for their 3rd Grade OST Math test.
Check out our sample 3rd Grade OST Math practice questions to find out what areas your student needs to practice more before taking the 3rd Grade OST Math test!
Start preparing your student for the 2026 OST Math test with our free sample practice questions. Also, make sure to follow some of the related links at the bottom of this post to get a better idea of what kind of mathematics questions students need to practice.
The Absolute Best Book to Ace the 3rd Grade OST Math Test
4- What is the value of “A” in the following equation?
\(21 + A + 9 = 44\)
A. 10
B. 12
C. 14
D. 20
5- Mr. smith usually eats four meals a day. How many meals does he eat in a week?
A. 21
B. 24
C. 28
D. 30
6- What is the value of A in the equation \(72 ÷ A = 8\)
A. 2
B. 6
C. 7
D. 9
7- Use the models below to answer the question.
\(
\)
Which statement about the models is true?
A. Each shows the same fraction because they are the same size.
B. Each shows a different fraction because they are different shapes.
C. Each shows the same fraction because they both have 3 sections shaded.
D. Each shows a different fraction because they both have 3 shaded sections but a different number of total sections.
8- To what number is the arrow pointing?
\(
\)
A. 36
B. 38
C. 40
D. 42
9- Emily has 108 stickers and she wants to give them to nine of her closest friends. If she gives them all an equal number of stickers, how many stickers will each of Emily’s friends receive?___________
10- The following models are the same size and each is divided into equal parts.
The models can be used to write two fractions.
\(
\)
Based on the models, which of the following statements is true?
A. \(\frac{2}{8}\) is bigger than \(\frac{4}{16}\).
B. \(\frac{2}{8}\) is smaller than \(\frac{4}{16}\).
C. \(\frac{2}{8}\) is equal to \(\frac{4}{16}\).
D. We cannot compare these two fractions only by using the models.
Best 3rd Grade OST Math Prep Resource for 2026
Answers:
1- A
\(8000 – 658 = 7342\)
2- D
\(14 × 40 = 560\)
3- C
24,589 is the sum of \(20,000; 4,000; 500; 80;\) and 9
4- C
\(A = 44 – (21 + 9)\)
\(A = 14\)
5- C
In 1 day 4 meals so \(4 × 7 = 28\) meals a week.
6- D
\(A = 72 ÷ 8\)
\(A= 9 \)
7- D
the model for the first fraction is divided into 6 equal parts. We shade 3_6 to show the same amount as 1_2. The model for the second fraction is divided into 8 equal parts. We shade 3_ 8 that it shows these two models are different fractions.
8- C
The arrow shows exactly the middle of two numbers 35 and 45, so the answer is 40
9- 12
\(108 ÷ 9 = 12\)
10- C
the model for the first fraction is divided into 8 equal parts. We shade 2_ 8 to show the same amount as 1_ 4. The model for the second fraction is divided into 16 equal parts. We shade 4_ 16 to show the same amount as 1_ 4.
Looking for the best resource to help you succeed on the OST Math test?
The Best Books to Ace the OST Math Test
Recommended EffortlessMath Books
For a workbook your child can use alongside these sample questions, Mastering Grade 3 Math covers every Ohio grade 3 topic with worked examples. For extra word-problem practice (where most third-graders lose points), see Mastering Grade 3 Math Word Problems.
Frequently Asked Questions
How many questions are on the 3rd grade OST Math test?
The grade 3 OST Math has about 35-40 questions split across two parts. Item formats include multiple choice, multi-select (pick all that apply), drag-and-drop, equation editor, and short open-response where your child types a number or short answer.
Is a calculator allowed on the 3rd grade OST?
No. Calculators aren’t allowed on the grade 3 Ohio State Test. Your child needs multiplication facts through \(10\times 10\) memorized and should handle multi-digit addition, subtraction, and basic division by hand.
How long does the 3rd grade OST Math take?
Each part runs about 70-85 minutes, though most third-graders finish in 60-75. The two parts are typically given on consecutive school days, so total math testing time is around 2.5 hours across two mornings.
What’s a passing score on the 3rd grade OST Math?
Ohio reports five performance levels: Limited, Basic, Proficient, Accelerated, and Advanced. Proficient (level 3) is the on-grade-level mark schools target. Ohio’s third-grade reading guarantee ties to ELA, not math, so a low math score by itself doesn’t trigger retention.
Can my child retake the OST?
No formal retake of the grade 3 math test – it’s given once per year, in the spring window. The spring score is the score of record. Low scores trigger extra classroom support the following year rather than a retest.
What math topics are on the 3rd grade OST?
Multiplication and division within 100, fractions on a number line and equivalent fractions, perimeter and area of rectangles, place value to 1,000, multi-digit addition and subtraction, measurement (time to the minute, length, mass), money word problems, and reading bar and picture graphs.
How long should we study for the OST Math?
For a child working at grade level, 4-6 weeks at 15-20 minutes a day is enough. For a child who’s been struggling, plan 8-12 weeks at 25 minutes a day. Multiplication-fact fluency is the single best thing to drill first – it sets up division, fractions, and area.
Where can we find more 3rd grade OST practice?
EffortlessMath has a longer full-length OST Math practice test, the Top 10 OST Math Practice Questions set, and the Mastering Grade 3 Math workbook that walks through every Ohio math topic with worked examples your child can follow at their own pace.
Does the OST align with Common Core?
Ohio’s Learning Standards are Common Core-aligned for grade 3 math, with a few Ohio-specific clarifications. The core topics – multiplication, fractions, area, place value – match Common Core grade 3 one-to-one, so Common Core prep materials still fit.
How can I help my child prep at home?
Three things move the needle: (1) 5 minutes of multiplication-fact drill daily, (2) one or two word problems read aloud at dinner with your child explaining their thinking, and (3) one short timed practice set per weekend so the test format feels familiar. Keep sessions brief and praise effort over scores.
Related EffortlessMath Lessons
If a topic on this page feels rusty, these short lessons go deeper:
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