![](http://www.alamy.com/thumbs/6/177FFACF-6C07-407E-B9E9-511D8B2A5A84/BC6B1B.jpg)
2x2=4
2x2=4 on blackboard
Size: 5100px × 3391px
Photo credit: © Andrzej Tokarski / Alamy / Afripics
License: Royalty Free
Model Released: Yes
Keywords: 2x2, blackboard, board, chalk, classroom, equation, green, hand, math, mathematics, school, simple, writing