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Have Trouble Adding or Subtracting Numbers in My Head

Known as: I have had trouble adding or subtracting numbers in my head 
A question about how often an individual has or had trouble adding or subtracting numbers in their head.
National Institutes of Health

Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
2018
2018
Las actividades lúdicas en el proceso enseñanza-aprendizaje.
The research project was developed with the purpose of supporting the value of the inclusion of playful strategies in the… 
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