Early math

Math begins with counting. It's the most important skill we learn in our early years, and it becomes the foundation for all other math concepts. Once we can count, we can add, subtract, and measure the world around us. Shortly thereafter, we learn about place values, graphs, time, money, and shapes.
Community Questions


Learn how to count. Say how many objects you see.

Addition and subtraction intro

Learn the basics of adding and subtracting.

Place value (tens and hundreds)

Learn about tens and hundreds. Compare 2-digit and 3-digit numbers.

Addition and subtraction within 20

Learn to add and subtract numbers that are 20 or less.

Addition and subtraction within 100

Learn to add and subtract two-digit numbers within 100.

Addition and subtraction within 1000

Learn to add and subtract two- and three-digit numbers within 1000.

Measurement and data

Learn how to measure length, tell time, count money, and make graphs.


Learn about triangles, circles, rectangles, and other shapes.
Early math: Questions

Give a great answer

Be a guide

We're teaching each other – so don't just answer "Yes" or "No", share your answer the way your favorite teacher would.

Vote, don't echo

If someone has already answered the question well, don't repeat their answer – vote it up instead.

Flag inappropriate posts

Here are posts to avoid making. If you do encounter them, flag them for attention from our Guardians.


  • disrespectful or offensive
  • an advertisement

not helpful

  • low quality
  • not about the video topic
  • contentious posts about politics, religion/atheism, or personal issues
  • soliciting votes or seeking badges
  • a homework question
  • a duplicate answer
  • repeatedly making the same post

wrong category

  • a tip or thanks in Questions
  • an answer that should be its own question

about the site