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Ohio Standards

Ohio 2nd Grade Math Standards

All 26 Ohio math standards for 2nd 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.

26 standards

Operations and Algebraic Thinking

4 standards
2.OA.1
Solve one- and two-step word problems within 100 where amounts are joined, separated, or compared, with the unknown anywhere, using drawings and equations.
2.OA.2
Add and subtract within 20 quickly using mental strategies, and know all sums of two one-digit numbers by heart by the end of the year.
2.OA.3
Tell whether a group of up to 20 objects is odd or even, and write an even number as a double, like 8 = 4 + 4.
Common Core 2.OA.3
2.OA.4
Find the total in an array of up to 5 rows and 5 columns by adding equal rows, like 3 + 3 + 3 + 3 = 12.
Common Core 2.OA.4

Number and Operations in Base Ten

9 standards
2.NBT.1
Know what each digit of a three-digit number is worth, like 347 is 3 hundreds, 4 tens and 7 ones, and that 100 is a bundle of ten tens.
Common Core 2.NBT.1
2.NBT.2
Count forward and back by 1s, 10s, and 100s from any number up to 1,000, and skip-count by 5s from any multiple of 5, like 35, 40, 45.
2.NBT.3
Read and write numbers up to 1,000 as numerals, in words, and in expanded form, and show the same number other ways, like 716 is 71 tens and 6 ones.
2.NBT.4
Compare two three-digit numbers by their hundreds, tens and ones, and record the answer with >, = or <.
Common Core 2.NBT.4
2.NBT.5
Add and subtract within 100 quickly and accurately, using place value and the link between addition and subtraction.
Common Core 2.NBT.5
2.NBT.6
Add up to four two-digit numbers at once, like 23 + 45 + 12 + 30, by grouping tens and ones.
Common Core 2.NBT.6
2.NBT.7
Add and subtract within 1,000 using models, drawings, and place value, combining hundreds, tens, and ones separately, regrouping when needed, and record and explain each step.
2.NBT.8
Add or subtract 10 or 100 in their head from any number between 100 and 900, like 540 + 100 = 640.
Common Core 2.NBT.8
2.NBT.9
Tell why an adding or subtracting method works, using place value and the rules of operations, with drawings or objects to help.

Measurement and Data

10 standards
2.MD.1
Pick the right tool, like a ruler, yardstick, meter stick or measuring tape, and measure how long an object is.
Common Core 2.MD.1
2.MD.2
Measure the same object in two different units, like inches and centimeters, and explain why the smaller unit gives a bigger number.
Common Core 2.MD.2
2.MD.3
Make a sensible guess at a length in inches, feet, centimeters or meters before measuring it.
Common Core 2.MD.3
2.MD.4
Measure two objects and say how much longer one is than the other, like 3 inches longer.
Common Core 2.MD.4
2.MD.5
Add and subtract within 100 to solve word problems about lengths in the same units, like how much longer one ribbon is, using drawings and equations.
2.MD.6
Show whole numbers as lengths from 0 on a number line, and use the number line to add and subtract within 100.
Common Core 2.MD.6
2.MD.7
Tell and write the time to the nearest five minutes on both clock faces and digital clocks, with a.m. and p.m.
Common Core 2.MD.7
2.MD.8
Name nickels and quarters and their values, total a mix of coins, and solve money word problems within 100 in dollars or cents only, using $ and ¢ without decimals.
2.MD.9
Measure several objects, or one object several times, to the nearest whole unit, and show the results on a line plot marked in whole units.
2.MD.10
Organize data with up to four categories, fill in picture graphs and bar graphs with a scale of one, and answer join, separate, and compare questions from the graph.

Geometry

3 standards
2.G.1
Name triangles, quadrilaterals, pentagons, and hexagons by counting their sides or corners, and recognize cubes, rectangular prisms, cones, and cylinders.
2.G.2
Split a rectangle into rows and columns of equal squares and count how many squares there are.
Common Core 2.G.2
2.G.3
Split circles and rectangles into 2, 3, or 4 equal shares called halves, thirds, or fourths, see the whole as all its shares, and know equal shares can differ in shape.

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.