mathematical calculation wrong |
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navigate by keyword : abstract adding addition answer apple apples background base big black board book books calculation child children childrens collection colorful easy education equals equation explanation four green hardback illustraiton illustration isolated mark math mathematical mathematics maths numbers ona one open photography pile question row school simple small stack sum table two white wooden wrong |
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Cropped shot of a class with a child on the board making a mathematical calculation wrong isolated on a school board |
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