# Chiarvalle Montessori Math Club

Welcome to everybody in math club and anyone else who's interested in mental math!

#### April 4, 2012

Finally finished the divisibility pages. Enjoy!

#### March 22, 2012

We looked at divisibility rules for 2, 5, 10, 4, 8, 3, 9, 11, 6, 12, and 7. Setting up the practice pages turned out to be harder than I thought. Sorry folks! Give me a few more days!

#### March 15, 2012

Today we reviewed multiplication. Next week—division. Our last meeting!

#### March 8, 2012

Today we learned how to multiply a one digit number by a two or three digit number

• Two by ones
(Example: 76 × 4 = 304, since 4 × 70 + 4 × 6 = 280 + 24 = 304)
• Three by ones
(Example: 726 × 3 = 2178, since 3 × 700 + 3 × 20 + 3 × 6 = 2100 + 60 + 18 = 2178)

#### March 1, 2012

This week, most of our students were getting ready for the Interest Fair, so we had a review.

#### February 23, 2012

Today we learned about thousands compliments and how to use compliments for making change. We also reviewed some of our other math tricks.

#### February 16, 2012

Today we learned some more addition and subtraction tricks. After you've practiced the hundred compliments, go back to the addition and subtraction problems. Try to use compliments in addition problems with carrying or subtraction problems with borrowing.

#### February 9, 2012

Today we reviewed some of the tricks we learned last time and added some new ones:

#### January 26, 2012

Here are the mental math tricks we practiced today. Click on the links for some extra practice.

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.