Sharing pirate Pete's treasure into 2 groups (sharing and number bonds 20) - maths investigation

I used this slideshow as a starting activity to help get the children thinking how many ways could you share 20 coins (using their knowledge of number bonds) - counters could be used to represent the coins and small hoops could be used for the children to try and find out as many ways as possible the treasure could be shared. (not about sharing equally - make that clear)