Section 3-3 Activities

Algorithms for Whole-Number Multiplication and Division

Section 3-3

Activity Name	Activity Description
Shape Explorer	The applet creates an irregular shape on a grid. Students determine area and perimeter of the given shape and check their answers with input to the applet. Discussion should focus on the concept of rectangular area as a geometric interpretation of multiplication.
Triangle Explorer	The applet creates a right triangle on a grid. Students determine area of the triangle and check their answers with input to the applet. The applet also supplies a 'hint' function that outlines a rectangle containing the original triangle. Discussion should focus on the concept of rectangular area as a geometric interpretation of multiplication and the analog between division of area and real number division.

Activity Name

Activity Description

The applet creates an irregular shape on a grid. Students determine area and perimeter of the given shape and check their answers with input to the applet. Discussion should focus on the concept of rectangular area as a geometric interpretation of multiplication.

Triangle Explorer

The applet creates a right triangle on a grid. Students determine area of the triangle and check their answers with input to the applet. The applet also supplies a 'hint' function that outlines a rectangle containing the original triangle. Discussion should focus on the concept of rectangular area as a geometric interpretation of multiplication and the analog between division of area and real number division.