![](http://www.alamy.com/thumbs/6/A308B819-9E08-4452-BD92-60501F0C3349/DKJXMB.jpg)
A blackboard with the sum 2+2 written on it in white chalk with correct and wrong answers.
Images of chalk words on a blackboard.
Size: 4256px × 2831px
Location: London, Ontario, Canada.
Photo credit: © Jonny White / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 2+2, 2+2=, 2+2=4, 2+2=5, blackboard, chalk, corrected, mathematics, maths, simple, sum, word, wrong