1st grade addition of tens hidden pictures game - Tens are numbers that are multiples of ten. In this game students will add some multiples of 10 e.g. 20 + 30 = 50. It is a hidden pictures fun game. It can also be perceived as an interactive educational fun quiz for students to use in reviewing basic addition skills. Hence, 1st, , 2nd and 3rd graders can use it to practice while at home or in school. Educational fun math games of the sort have been very successful in teaching math concepts which are otherwise perceived as difficult by students. This game can be accessed from a mobile device or on a PC and is always freely available online. Please share and have fun learning.