Åk 6–9
1.1 Introduction
Everyday, you use numbers.  We would have huge difficulties getting through a normal day in modern society if we didn’t have them.  Try not mentioning any numbers during an entire day.  

Here are some daily situations where you might use natural numbers.

- Three meatballs, two potatoes, and a dollop of lingonberry jam please!

Foto: Fredrik Enander

- How many movie tickets do you want to buy?
 - Four, thank you!

Foto: Fredrik Hjelm

- How many days is there left until summer vacation?
- There are 18 days left.

Foto: Dan Gunnarsson

In this section, we will be taking a closer look at a set of numbers that are the basis for all of math, the natural numbers.