Each rod has a number on one side and a corresponding number of dots on the reverse side. Children will love to join the rods together as they can tackle a number of different mathematical areas such as addition & subtraction and multiplication & division. Each rod is colour coded to represent a number. A great tool for young maths learners. There are 10 addition and 10 subtraction colour-coded cards that are available to add to your sets. This set contains a selection of 128 rods numbered 1-10.