Skip navigation.

Practice

Related Links

Squaring a two-digit number that ends with 5

Example

To solve 652:

Think Write
Six times 7 is 42 42
25 4225

Practice

Problem: 552


Leone Learning Systems, Inc. (LLS) is a North Shore company that provides online courses for kids anywhere and local teaching and tutoring services for students in Chicago and the Northern Suburbs of Chicagoland. LLS also provides a free geometry software package for children age 6 and up, and free resources for teachers and parents. This site includes information about tutoring and classes provided, learning activities for kids, lesson plans, and ongoing software and curriculum research and development efforts.