OST Grade 3 Math study guide
OST Grade 3 Math · Work through your exam, one topic at a time.
Ohio's State Tests (OST) Grade 3 Mathematics is the state mathematics assessment Ohio students take in third grade, one of the Ohio's State Tests administered by the Ohio Department of Education and Workforce. This page is an independent study resource for families, tutors, and educators preparing for that assessment; it is not affiliated with, endorsed by, or operated by the Ohio Department of Education and Workforce. The OST Grade 3 Math study guide has 5 sections and about 1,773 words.
01Operations and Algebraic Thinking
Operations and Algebraic Thinking is a major Grade 3 math domain on the OST. It tests whether you can interpret products and quotients, solve one- and two-step word problems with all four operations, and explain patterns in multiplication and addition tables.
371 words, about 2 min02Number and Operations in Base Ten
Number and Operations in Base Ten in Grade 3 focuses on three big ideas: rounding whole numbers to the nearest 10 or 100, adding and subtracting within 1,000 with fluency, and multiplying one-digit numbers by multiples of 10. Place value: in 472, the 4 means 400, the 7 means 70, and the 2 means 2.
372 words, about 2 min03Number and Operations-Fractions
Number and Operations-Fractions introduces fractions as numbers. Grade 3 students build fractions from unit fractions, place them on number lines, recognize simple equivalent fractions, and compare fractions with the same numerator or the same denominator.
340 words, about 2 min04Measurement and Data
Measurement and Data covers time, mass and liquid volume, scaled graphs and line plots, and area and perimeter. Grade 3 items often combine measuring with arithmetic, so read the units before you calculate.
343 words, about 2 min05Geometry
Geometry in Grade 3 asks you to classify shapes by their attributes and to partition shapes into equal areas. You need precise vocabulary: sides, angles, parallel, and the names of quadrilaterals.
347 words, about 2 min