Students generalize rules for adding and multiplying even and odd numbers. Possible student responses:An integer that can be evenly divided by 2. A number whose unit digit is 0, 2, 4, 6 or 8. All the multiples of 2. This is true every time two even numbers are added together because even numbers never have dots left over when we are circling pairs. When we circle groups of two dots, there is one dot remaining in each representation because each addend is an odd number.