The perfect Maths Mastery resource!The Base Ten Wooden number system refers to the decimal numbering system used by the majority of the world and this resource helps teach children place value number bonds addition and subtraction.Use for measurement and volume as well as number.The set consists of 2 x 100mm ones 20 x 100mm x 100mm x 10mm hundreds 20 x 100mm x 10mm x 10mm tens and 100 x 10mm ones.