Short note on algebraic notations: First encounter with letter variables in primary school

Steinweg, Anna SusanneAnna SusanneSteinweg0000-0002-9093-547X2020-02-112020-02-112019978-90-73346-75-8https://fis.uni-bamberg.de/handle/uniba/47246engShort note on algebraic notations: First encounter with letter variables in primary schoolbookparthttp://www.mathematik.uni-dortmund.de/~prediger/ERME/CERME11_Proceedings_2019.pdf