Practicing addition tables is often the first step to understanding math and basic math operations. This booklet contains the addition tables for the numbers 1 through 9 where the second addend is shown in random order. For example, a page will show the table for 4 + 7, 4 + 4, 4 + 1 etc. Another page will show the table for 8 + 3, 8 + 2, 8 plus 9 and so on. There are nine pages in each booklet, sold in a pack of ten booklets.