An introduction to positive and negative numbers. Cartoon-style numbers initially form a line from 0 to 9. The negative numbers 1 to -9 then join the line in the correct sequence. The clip continues ...

Numbers don’t stop at zero. They continue into negative numbers as you count backwards. If you start at 2 and count backwards, you get 2, 1, 0, -1, -2, and the numbers keep going. Take a look at the ...