July 14, 2026

Alex Emond

A guide to 2nd grade math topics

Your 2nd grader has questions, and Duolingo Math has answers!

In 2nd grade math, your learner is starting to get comfortable with the fundamentals of addition, subtraction, and the number system—the building blocks for every grade ahead. Building a solid foundation with 2nd grade math topics today will help your learner see tomorrow’s math challenge as a fun puzzle instead of a brick wall.

Duolingo Math provides a fun, interactive environment designed to help your 2nd grader master these essential skills.

Finding patterns in numbers

In 2nd grade math, learners are moving on from simple counting by ones. They’re spotting patterns to better understand how counting by a number is the same as adding. They’re also starting to count by 10s and 100s to understand place value—this is the foundation for understanding how our number system works.

In the Duolingo unit on Number patterns, learners will practice:

• Skip-counting by 3s, 4s, 5s, and 10s
• Using counting patterns to understand addition
• Using expanded forms to understand place value in larger numbers

Getting comfortable adding and subtracting

When it comes to adding and subtracting, your 2nd grader is taking the leap from understanding to fluency. They’re practicing ways of thinking that will help them do mental math quickly and accurately. Being comfortable with adding and subtracting small numbers is crucial for your learner’s math success in all grades to come.

In the Duolingo unit Intro to Addition and Subtraction, learners will practice:

• Recognizing patterns in addition and subtraction
• Adding and subtracting numbers quickly
• Finding different ways to add to and subtract from one number

Taking on bigger numbers

While 2nd graders get comfortable adding and subtracting small numbers quickly, they’re also working with larger numbers and multiple numbers at once. They’re learning strategies for adding and subtracting that will help them work with numbers of any size or quantity in the future.

In the Duolingo units that teach learners to Add and subtract multiple numbers and Add and subtract up to 500, they will practice:

• Adding and subtracting 3-digit numbers
• Adding and subtracting multiple 2-digit numbers
• Using place value to add and subtract large numbers

Duolingo Math helps your 2nd grader build new skills

Duolingo Math is here to help your learner breeze through 2nd grade math topics with confidence! Whether they’re working on spotting patterns, developing quick thinking, or tackling challenging new numbers, your 2nd grader has the tools to carry them through today’s lessons and tomorrow’s milestones.