2.1
Numbers Sense
Have you ever tried to think of really big numbers? Can you imagine how big a million of something might look? In a large anthill, there can live about a million ants.
Imagine the number one billion (1,000,000,000) as a stack of one crown Swedish coins. A billion one crown coins would be 1,900 km high. That would be a 250 km longer than the distance between Ystad and Kiruna. 

Foto: Fredrik Enander 
