Pre-k and Kindergarten add of single digits game - Single digit numbers are also referred to as one place numbers indicating that there is no other number to the left or right of that digit. Adding single place numbers is quite simple and straight forward. Sometimes, students have to add and carry and other times not. Whichever situation a student is confronted with, adding single digit numbers is quite easy and can be made easier by adding with counting aids like chips or sticks. This is a hidden pictures interactive online game with MCQ�s. Once you answer a question rightly, a picture opens progressively. Have fun learning.