# Multiplication Workout

This is an interactive arithmetic lesson that uses the Arithmetic simulation to explore grouping or multiplication. The simulation was created by the Physics Education Technology Team (PhET) at the University of Colorado. A screenshot of the simulation is shown on the left of the image table below. Multiplication Wikipedia has an article on this subject. Visit Multiplication for more in depth information

Grouping objects happens everyday. Sometimes we group lego pieces to make a pattern. Sometimes we group Monopoly money together to purchase a house. All this grouping going is called multiplication. The bag of marbles image demonstrates how we group 4 bags of 3 marbles to get 12 marbles. In symbols this looks like 4 × 3 = 12. In words we can say, four times three equals twelve.

Multiplication is also related to area (or a flat surface like your computer screen). The checkboard image below is a big square made up of five small squares per side. We think of this as multiplying five by five. In symbols, 5 × 5 = 25. Count the small squares. Are we correct? Objectives