Year 1 Addition Here are some brand new worksheets we have written on part whole models. You may not have come across these before, they are designed to show children that numbers can be partitioned into parts. For example: a collection of birds is made up of 2 blue tits 3 robins 1 goldfinch They add up to 6, so the whole number is 6 and the parts are 2, 3 and 1. These are a great way of helping children with number bonds and well worth a look. Go to Year 1 Addition