Friend's Email: Subject:I have found a book that I think you would enjoy
Understanding NUmbers Addition and Subtraction
Understanding NUmbers Addition and Subtraction Author:Kathy Richardson This is a book for teachers and parents of students in Grades 3-5. It will help you understand how to use the place value structure of the base 10 number system to combine quantities by reorganizing into hundreds, tens, and ones. It contains station ideas and black line masters.