A blackboard with the sum 2+2=4 written on it in white chalk.

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Images of chalk words on a blackboard.

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Size: 4256px × 2831px
Location: London, Ontario, Canada.
Photo credit: © Jonny White / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 2+2, 2+2=4, =4, add, addition, answer, blackboard, chalk, correct, maths, sum, word, written