Grade 2 Math: Common Core Standards
Your Teacher Information Pack for Grade 2 Math: every Common Core standard with its official code, notes on which states use them, and trusted links. Tick what you're teaching and send it straight into the lesson plan maker.
- Country
- United States
- Grade
- Grade 2
- Ages
- about 7–8 (varies by state)
- Status
- Not federal law: adopted state by state
- Source
- Common Core State Standards – 2010
- Last checked
- 2026-10-20
Does my state use these standards?
Your state may use its own standards. Common Core is not federal law: each state decides. For math (compiled 2026-10-20, check your state's site before relying on it):
- Use their own standards, not Common Core (14): Alabama, Alaska, Florida, Georgia, Indiana, Kentucky, Minnesota, Missouri, Nebraska, Oklahoma, South Carolina, Tennessee, Texas, Virginia. Codes on this page won't match your state's paperwork.
- Adapted and renamed (24): Arizona, Arkansas, Colorado, Idaho, Kansas, Louisiana, Maine, Maryland, Massachusetts, Mississippi, Montana, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Ohio, Oregon, Pennsylvania, South Dakota, Utah, West Virginia, Wisconsin, Wyoming. Mostly similar, but check wording and codes.
- Common Core as written (13): California, Connecticut, Delaware, District of Columbia, Hawaii, Illinois, Iowa, Michigan, Nevada, New Mexico, Rhode Island, Vermont, Washington.
The standards
Standards are grouped into domains (big areas such as Operations & Algebraic Thinking) and clusters (the bold lines). Each code links to the official page. ★ marks a modeling standard and (+) additional mathematics for advanced courses.
Operations & Algebraic Thinking (OA) 4 standards
- Represent and solve problems involving addition and subtraction.
- 2.OA.A.1 Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.1Note: See Glossary, Table 1.
- Add and subtract within 20.
- 2.OA.B.2 Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers.Note: See standard 1.OA.6 for a list of mental strategies.
- Work with equal groups of objects to gain foundations for multiplication.
- 2.OA.C.3 Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends.
- 2.OA.C.4 Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.
Number & Operations in Base Ten (NBT) 9 standards
- Understand place value.
- 2.NBT.A.1 Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:
- 2.NBT.A.1.a 100 can be thought of as a bundle of ten tens — called a "hundred."
- 2.NBT.A.1.b The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds (and 0 tens and 0 ones).
- 2.NBT.A.2 Count within 1000; skip-count by 5s, 10s, and 100s.
- 2.NBT.A.3 Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.
- 2.NBT.A.4 Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.
- 2.NBT.A.1 Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:
- Use place value understanding and properties of operations to add and subtract.
- 2.NBT.B.5 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
- 2.NBT.B.6 Add up to four two-digit numbers using strategies based on place value and properties of operations.
- 2.NBT.B.7 Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.
- 2.NBT.B.8 Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.
- 2.NBT.B.9 Explain why addition and subtraction strategies work, using place value and the properties of operations.1Note: Explanations may be supported by drawings or objects.
Measurement & Data (MD) 10 standards
- Measure and estimate lengths in standard units.
- 2.MD.A.1 Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.
- 2.MD.A.2 Measure the length of an object twice, using length units of different lengths for the two measurements; describe how the two measurements relate to the size of the unit chosen.
- 2.MD.A.3 Estimate lengths using units of inches, feet, centimeters, and meters.
- 2.MD.A.4 Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.
- Relate addition and subtraction to length.
- 2.MD.B.5 Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units, e.g., by using drawings (such as drawings of rulers) and equations with a symbol for the unknown number to represent the problem.
- 2.MD.B.6 Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, ..., and represent whole-number sums and differences within 100 on a number line diagram.
- Work with time and money.
- 2.MD.C.7 Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m.
- 2.MD.C.8 Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately. Example: If you have 2 dimes and 3 pennies, how many cents do you have?
- Represent and interpret data.
- 2.MD.D.9 Generate measurement data by measuring lengths of several objects to the nearest whole unit, or by making repeated measurements of the same object. Show the measurements by making a line plot, where the horizontal scale is marked off in whole-number units.
- 2.MD.D.10 Draw a picture graph and a bar graph (with single-unit scale) to represent a data set with up to four categories. Solve simple put-together, take-apart, and compare problems1 using information presented in a bar graph.Note: See Glossary, Table 1
Geometry (G) 3 standards
- Reason with shapes and their attributes.
- 2.G.A.1 Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces.1 Identify triangles, quadrilaterals, pentagons, hexagons, and cubes.Note: Sizes are compared directly or visually, not compared by measuring.
- 2.G.A.2 Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.
- 2.G.A.3 Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half of, a third of, etc., and describe the whole as two halves, three thirds, four fourths. Recognize that equal shares of identical wholes need not have the same shape.
Standards for Mathematical Practice apply to every grade and course
- MP1 Make sense of problems and persevere in solving them.
- MP2 Reason abstractly and quantitatively.
- MP3 Construct viable arguments and critique the reasoning of others.
- MP4 Model with mathematics.
- MP5 Use appropriate tools strategically.
- MP6 Attend to precision.
- MP7 Look for and make use of structure.
- MP8 Look for and express regularity in repeated reasoning.
Tests and key dates
Each state sets its own tests and testing windows. Check your state education department (links on our state list) and your district calendar.
Official documents
Trusted free resources
- Khan Academy – Free practice, videos and teacher tools (US grades and courses).
Links only: we don't copy their content and we aren't connected to these organisations.
More packs
Related: High School Number and Quantity, High School Algebra, High School Functions, High School Geometry, High School Statistics and Probability, Algebra I, Geometry, Algebra II.
© Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.
The Common Core State Standards are owned and developed by the National Governors Association Center for Best Practices (NGA Center) and the Council of Chief State School Officers (CCSSO), and are shown here under the Common Core State Standards Public License. Examples from the official site are not included. Classfern is not affiliated with or endorsed by NGA Center or CCSSO. Each standard links to its official page.
Frequently asked questions
Do all states use the Common Core math standards?
No. In our 2026-10-20 review of the 50 states and DC, 13 use the Common Core math standards as written, 24 use an adapted version under their own name, and 14 use their own standards. Check your state's education website.
What does a code like 3.OA.A.1 mean?
It is the official Common Core identifier: grade (3), domain (OA = Operations and Algebraic Thinking), cluster (A) and standard number (1). The full form is CCSS.Math.Content.3.OA.A.1.