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Ohio Standards

Ohio 3rd Grade Math Standards

All 25 Ohio math standards for 3rd grade, each explained in plain English. The official wording is in Ohio Department of Education and Workforce's document, linked at the end of this page.

25 standards

Operations and Algebraic Thinking

9 standards
3.OA.1
Read a product like 5 × 7 as the total in 5 groups of 7 objects, knowing it can also mean 7 groups of 5.
3.OA.2
Read a division fact as sharing or grouping, like 56 ÷ 8 as 56 objects split into 8 equal shares.
Common Core 3.OA.2
3.OA.3
Multiply and divide within 100 to solve word problems about equal groups, arrays, and measurements, using drawings or an equation with a letter for the unknown.
3.OA.4
Find the missing number in a multiplication or division fact, like 8 × ? = 48.
Common Core 3.OA.4
3.OA.5
Use properties of operations to multiply and divide, like knowing 4 × 6 equals 6 × 4, or finding 8 × 7 as 8 × 5 plus 8 × 2.
3.OA.6
Solve a division problem by finding the missing factor, like 32 ÷ 8 as what times 8 makes 32.
Common Core 3.OA.6
3.OA.7
Multiply and divide within 100 quickly, with no remainders, using links like 8 × 5 = 40 so 40 ÷ 5 = 8, and know all one-digit times facts by heart by year's end.
3.OA.8
Solve two-step whole-number word problems using all four operations, write an equation with a letter for the unknown, and check the answer with rounding and mental math.
3.OA.9
Spot patterns in the addition and multiplication tables and explain them, like why 4 times any number is even.
Common Core 3.OA.9

Number and Operations in Base Ten

3 standards
3.NBT.1
Round whole numbers to the nearest ten or hundred, like 347 to 350 or to 300.
Common Core 3.NBT.1
3.NBT.2
Add and subtract within 1,000 quickly and accurately, using methods built on place value, properties of operations, or how adding and subtracting are related.
3.NBT.3
Multiply a one-digit number by a multiple of ten from 10 to 90, like 5 × 60 or 9 × 80.
Common Core 3.NBT.3

Number and Operations—Fractions

3 standards
3.NF.1
Understand 1/4 as one of four equal parts of a whole, and 3/4 as three of those parts.
Common Core 3.NF.1
3.NF.2
Place fractions on a number line by splitting the space from 0 to 1 into equal parts and counting them off.
Common Core 3.NF.2
3.NF.3
Tell when two fractions are equivalent, like 1/2 and 2/4, write whole numbers as fractions, and compare fractions with the same numerator or denominator.
Common Core 3.NF.3

Measurement and Data

8 standards
3.MD.1
Tell time to the minute, solve elapsed time problems within 90 minutes, and solve money word problems within 1,000 in dollars or cents only, without decimals.
3.MD.2
Measure and estimate liquid volume and mass in liters, grams, and kilograms, and solve one-step word problems about them using any operation in the same units.
3.MD.3
Make picture graphs and bar graphs where each symbol or square stands for several items, like 5 pets, and solve two-step how many more or less problems from them.
3.MD.4
Measure lengths to the nearest half or quarter inch with a ruler and show the data on a line plot marked in whole numbers, halves, or quarters.
3.MD.5
Understand area as the number of unit squares that cover a flat shape with no gaps or overlaps.
Common Core 3.MD.5
3.MD.6
Find the area of a shape by counting the unit squares that cover it, in square centimeters, meters, inches or feet.
Common Core 3.MD.6
3.MD.7
Find the area of a rectangle by multiplying its side lengths, and find the area of an L-shaped figure by splitting it into rectangles and adding.
Common Core 3.MD.7
3.MD.8
Find a polygon's perimeter from its side lengths, find a missing side length, and show that rectangles with the same perimeter can have different areas.
Common Core 3.MD.8

Geometry

2 standards
3.G.1
Draw and describe triangles, rhombuses, rectangles, squares, and polygons with up to 8 sides by their number of sides and whether they have right angles.
3.G.2
Split a shape into equal parts and name each part as a fraction of the whole, like one of 4 equal parts is 1/4 of the shape.
Common Core 3.G.2

The official Ohio documents

The plain-English lines on this page are EMStudio's own explanations of Ohio's standards, not the official wording, which Ohio Department of Education and Workforce publishes in the documents above. Codes and strand names identify each standard.