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1st Grade Math

DC 1st Grade Math Curriculum

Video lessons and practice for every 1st grade math topic. Aligned to what District of Columbia schools teach. Help your child keep up or get ahead.

DC 1st Grade Math Curriculum | StudyPugHelp

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1.OA.A.2

Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20

1.OA.B.3

Apply properties of operations as strategies to add and subtract

1.OA.B.4

Understand subtraction as an unknown-addend problem

1.OA.C.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10

1.OA.D.7

Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false

1.NBT.B.2

Understand that the two digits of a two-digit number represent amounts of tens and ones

1.NBT.B.3

Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <

1.NBT.C.5

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count

1.G.A.3

Partition circles and rectangles into two and four equal shares

1st Grade Math Topics in DC

District of Columbia 1st graders work through a wide range of foundational math skills. StudyPug covers every topic, from solving word problems with addition and subtraction to understanding place value with tens and ones.

Addition and Subtraction

First graders in DC learn to add and subtract within 20, solve word problems, add three whole numbers, and apply properties of operations. They also explore the relationship between addition and subtraction and build fluency within 10.

  • Add and subtract within 20
  • Solve word problems using addition and subtraction
  • Understand subtraction as an unknown-addend problem
  • Determine unknown numbers in addition and subtraction equations

Place Value and Number Sense

Students count to 120, understand that two-digit numbers represent tens and ones, and compare two-digit numbers using >, =, and < symbols.

  • Count to 120 starting from any number
  • Understand tens and ones in two-digit numbers
  • Compare two-digit numbers
  • Add within 100, including two-digit and one-digit numbers
  • Mentally find 10 more or 10 less than any two-digit number
  • Subtract multiples of 10

Measurement and Data

1st graders order objects by length, use length units to measure, tell time to the hour and half-hour, and organize data into up to three categories.

  • Order three objects by length
  • Express length as a whole number of units
  • Tell and write time in hours and half-hours
  • Organize and interpret data with up to three categories

Geometry

Students identify defining and non-defining attributes of shapes, compose 2D and 3D shapes, and partition circles and rectangles into equal shares.

  • Distinguish defining vs. non-defining shape attributes
  • Compose two-dimensional and three-dimensional shapes
  • Partition circles and rectangles into two and four equal shares