Kumon Workbooks introduce basic learning skills to children aged 2 through 6. Concepts are introduced in a step-by-step manner that allows the child to master each in turn without getting frustrated. This sequel to My Book of Numbers: 1-30 will help children learn how to read and write numbers confidently up to 120. By practicing numbers in numerical order, such as 9-10 and 99-100, children gradually grasp the concept of decimal position. Recognition of the decimal place is crucial for the later acquisition of addition skills. 40 activities designed for ages 4-6. Paperback, 80 pages, measures 8-1/4 x 11-3/4".