The teacher gave 12 books a group of children and asked them to arrange them in different groups under some conditions like (A) Each group should have the same number of books.(B) No of books should be left over.(C) Each grouping should be different from the other.This activity will help the children to understand the concept of

• A. Addition                                  
• B. Subtraction
• C. Multiples and factors
• D. Measurements