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1st Grade Math

Oregon 1st Grade Math Curriculum

Video lessons and practice for every 1st grade math topic. Aligned to Oregon Mathematics Standards so your child learns exactly what Oregon schools teach.

Oregon 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

Oregon 1st Grade Math: What Students Learn

Oregon 1st grade math covers a wide range of foundational skills that prepare students for more advanced math in later grades. Aligned to the Oregon Mathematics Standards, the curriculum focuses on building number sense, understanding operations, and exploring basic measurement and geometry concepts.

Addition and Subtraction Within 20

First graders in Oregon learn to add and subtract within 20, including solving word problems with one and two operations. Students practice adding three whole numbers, apply properties of operations, and develop fluency with addition and subtraction within 10. These skills form the backbone of all future math learning.

Place Value and Two-Digit Numbers

Students explore how two-digit numbers are made up of tens and ones. They count to 120, compare two-digit numbers using the symbols >, =, and <, and learn to mentally find 10 more or 10 less than any number. They also practice adding within 100 and subtracting multiples of 10.

Measurement and Data

Oregon 1st graders measure and compare object lengths, express lengths as whole number units, and tell time to the hour and half-hour using analog and digital clocks. They also organize and interpret data sorted into up to three categories.

Geometry

Students identify defining and non-defining attributes of shapes, compose two-dimensional and three-dimensional shapes, and partition circles and rectangles into equal shares. These early geometry skills build spatial reasoning that continues through elementary school.

How StudyPug Helps Oregon 1st Graders

StudyPug provides video lessons and practice problems for every topic in the Oregon 1st grade math curriculum. Each lesson is short, clear, and easy to follow — perfect for homework help or getting ahead. Students can:

  • Watch video lessons broken into 5–15 minute segments
  • Practice problems right after each lesson
  • Revisit any topic as many times as needed
  • Learn on any device — computer, tablet, or phone

All content aligns to the Oregon Mathematics Standards, so students always study what their Oregon teacher is covering in class.