The Grid Multiplication iPhone Math App

This app can be used to teach and study the grid multiplication method. The app is easy to use and it has an intuitive interactive interface with customizable colors and other settings. The user can solve random and custom multiplication problems.

The Gird Multiplication Method

The grid multiplication method is a two-step process. In the example 39 x 24 the numbers are first broken up into 30 + 9 and 20 + 4, and written on a grid. Multiplying the row and column headers then solves each cell of the grid. Eventually the partial products 600, 180, 120, and 36 are added together.

The App is Easy to Use

The numbers are aligned automatically so that the user can concentrate on solving the operations for each column.

After you solve the operation for each partial product the correct answer will fly to the right place. If you press the wrong button the answer will appear above the keyboard but it will not move.

Difficulty can be set with Settings

• Each number can have from 2 to 3 digits.
• Random and custom problems.
• The current operation can be hidden.
• The operands of the current operation can be highlighted.
• Colors of the interface can be changed.
• The speed of the animations can be set.

Feedback and Requests for New Features

Please give feedback at iTunes or visit my site idevbooks.com and give feedback there about this application. Please tell me if you have any ideas for new features.

Availability

The app can be purchased and downloaded from the iTunes App Store in 90 countries. The apps work in every iPhone and iPod Touch ever made (with iOS 3.0 or newer) and also in the new iPad.

Video of the Grid Multiplication App

Video

See a video of the app.

Screenshots