Khan Academy
Khan Academy: Math: 3rd Grade: Multiply With Arrays (Practice)
Math practice exercise on using arrays to multiply.
Khan Academy
Khan Academy: Math: 3rd Grade: Understand Multiplication With Arrays (Practice)
Math practice exercise on using arrays to multiply.
Khan Academy
Khan Academy: Math: 3rd Grade: Understand Multiplication Using Groups of Objects
Math practice exercise on using arrays and repeated addition to visualize multiplication.
Khan Academy
Khan Academy: Intro to Multiplication
Explains what multiplication is and how to represent it using equal groups and arrays. Also looks at the strategies of repeated addition and skip counting and how they can be used to solve multiplication problems. Includes practice...
University of Cambridge
University of Cambridge: Nrich: Napier's Bones
Use this one page website to learn how to multiply and divide a "new" way. This method was invented over 400 years ago by John Napier. A detailed explanation is only a click away.
Khan Academy
Khan Academy: Divide With Vsuals
Practice basic division using various visuals, such as arrays. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.