Grade 1 Common Core Math Practice

The focus in Grade 1 is on the following four critical areas:

  • Developing understanding of addition, subtraction, and strategies for addition and subtraction within 20
  • Developing understanding of whole number relationships and place value, including grouping in tens and ones
  • Developing understanding of linear measurement and measuring lengths as iterating length units
  • Reasoning about attributes of, and composing and decomposing geometric shapes

Overview of Grade 1 Standards

Operations and Algebraic Thinking

  • Represent and solve problems involving addition and subtraction (1.OA.A.1, 1.OA.A.2)
  • Understand and apply properties of operations and the relationship between addition and subtraction (1.OA.B.3, 1.OA.B.4)
  • Add and subtract within 20 (1.OA.C.5, 1.OA.C.6)
  • Work with addition and subtraction equations (1.OA.D.7, 1.OA.D.8)

Number and Operations in Base Ten

  • Extend the counting sequence (1.NBT.A.1)
  • Understand place value (1.NBT.B.2, 1.NBT.B.2.A, 1.NBT.B.2.B, 1.NBT.B.2.C, 1.NBT.B.3)
  • Use place value understanding and properties of operations to add and subtract (1.NBT.C.4, 1.NBT.C.5, 1.NBT.C.6

Measurement and Data

  • Measure lengths indirectly and by iterating length units (1.MD.A.1, 1.MD.A.2)
  • Tell and write time (1.MD.B.3)
  • Represent and interpret data (1.MD.C.4)


  • Reason with shapes and their attributes (1.G.A.1, 1.G.A.2, 1.G.A.3)

Mathematical Practices

  • Make sense of problems and persevere in solving them
  • Reason abstractly and quantitatively
  • Construct viable arguments and critique the reasoning of others
  • Model with mathematics
  • Use appropriate tools strategically
  • Attend to precision
  • Look for and make use of structure
  • Look for and express regularity in repeated reasoning