The Common Core in North Carolina

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Skills available for North Carolina first-grade math standards

Standards are in black and IXL math skills are in dark green. Hold your mouse over the name of a skill to view a sample question. Click on the name of a skill to practice that skill.

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NC.1.OA Operations and Algebraic Thinking

NC.1.NBT Number and Operations in Base Ten

  • Extend and recognize patterns in the counting sequence.

    • NC.1.NBT.1 Count to 150, starting at any number less than 150.

    • NC.1.NBT.7 Read and write numerals, and represent a number of objects with a written numeral, to 100.

  • Understand place value.

  • Use place value understanding and properties of operations.

    • NC.1.NBT.4 Using concrete models or drawings, strategies based on place value, properties of operations, and explaining the reasoning used, add, within 100, in the following situations:

      • NC.1.NBT.4.a A two-digit number and a one-digit number

      • NC.1.NBT.4.b A two-digit number and a multiple of 10

    • NC.1.NBT.5 Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

    • NC.1.NBT.6 Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90, explaining the reasoning, using:

      • NC.1.NBT.6.a Concrete models and drawings

      • NC.1.NBT.6.b Number lines

      • NC.1.NBT.6.c Strategies based on place value

      • NC.1.NBT.6.d Properties of operations

      • NC.1.NBT.6.e The relationship between addition and subtraction

NC.1.MD Measurement and Data

NC.1.G Geometry

  • Reason with shapes and their attributes.

    • NC.1.G.1 Distinguish between defining and non-defining attributes and create shapes with defining attributes by:

      • NC.1.G.1.a Building and drawing triangles, rectangles, squares, trapezoids, hexagons, circles.

      • NC.1.G.1.b Building cubes, rectangular prisms, cones, spheres, and cylinders.

    • NC.1.G.2 Create composite shapes by:

      • NC.1.G.2.a Making a two-dimensional composite shape using rectangles, squares, trapezoids, triangles, and half-circles naming the components of the new shape.

      • NC.1.G.2.b Making a three-dimensional composite shape using cubes, rectangular prisms, cones, and cylinders, naming the components of the new shape.

    • NC.1.G.3 Partition circles and rectangles into two and four equal shares.

      • NC.1.G.3.a Describe the shares as halves and fourths, as half of and fourth of.

      • NC.1.G.3.b Describe the whole as two of, or four of the shares.

      • NC.1.G.3.c Explain that decomposing into more equal shares creates smaller shares.