The perfect Maths Mastery resource! The base ten 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. This Ten hundreds are perfect for group or individual work. Base 10 hundreds are perfect for children exploring number at the concrete stage of Maths Mastery or to aid those working on problem solving tasks that need manipulatives to support their investigation. Pack of 50 hundreds