Resumen de Addition problems in creative ways
576 May 2011 � teaching children mathematics www.nctm.org Laken B. Harrell back talk Addition problems in creative ways can you double-check your answer? I want you to look at your answer to fi gure out how to check yourself while I work with another student [moving over to listen to Caedens strategy]. I didnt get twen Online Extra: http://www.nctm.org/uploadedFiles/Journals_and_Books/TCM/Extras/TCM2011-05-576c.pdf
