Natural numbers

The counting numbers 1, 2, 3, ... - what you get by starting at one and adding one more, again and again. There is no biggest one.

Depth 1 · Foundation

You know the counting numbers come from adding one more each time, and that they never run out.

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Depths of understanding

1
Foundation
You know the counting numbers come from adding one more each time, and that they never run out.
- Read itOne More, ForeverNumbers Level 1: What Is a Number?
Opens after
CountingThe natural numbers are the words we count with.
2
Deeper
You see the naturals as a discrete skeleton sitting inside the continuous real line - and why that difference matters.
Master depth 1 first
Real numbersOnly once you know the reals can you see what makes the naturals special - they are isolated points with gaps between them, while the reals have none.

Your path here

What's still between you and Natural numbers, depth 1, in the order you can learn it.

Where it fits

Builds on

This concept

Natural numbersNumber Systems

Opens up

The number line Zero

Builds onThis conceptOpens upCounting Natural numbersNumber Systems The number line Zero