Addition and subtraction

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These pages were made through TeacherTECH, the teacher professional development component of GirlTECH, which is sponsored by the Center for Excellence and Equity in Education (CEEE) with support from the National Science Foundation through EOT-PACI, RGK Foundation, the Verizon Foundation, Rice University, and HiPerSoft.

Copyright June 2002 by Consuelo Llamas

 

 

 

 

http://www.sssoftware.com/freeworksheets/subtraction.html

http://www.sssoftware.com/freeworksheets/subtraction.html