Little Juan and Pedro have been sent to buy sausages for a barbecue. There are going to be 20 guests but they only have 6 sausages. They visit the shop to buy some more, and the shopkeeper says he has a pack of 15. El Nombre helps them to work out whether or not they've now got enough sausages by adding the two numbers together. When Little Juan and Pedro try to add 15 and 6, El Nombre explains it is best to start with the biggest number first when adding two numbers together.
Students could be given a similar problem. All the students who have an eraser could be asked to raise their hand in order to determine that they have x number of erasers in total. Students could then work out if this would be enough to ensure everyone in class has one, using the same strategy as El Nombre. Repeat for other items such as pencils and rulers.