Grid Multiplication 6.5

This mathematics application serves as a tool for instructing and practicing the grid multiplication method. Its user interface is designed to be intuitive and accessible, featuring customizable color schemes and adjustable settings to suit individual preferences.

The grid multiplication app is part of a suite of 17 educational math applications, which was reviewed by Wired.com in the article “A Set of Excellent iPhone Math Apps for the Older Child”.

Endorsements from educators highlight its pedagogical value:

• R. Zeni, Ecole Sandy Hill Elementary, Abbotsford, BC, Canada: “The math apps developed by Esa Helttula enable students to practice and reinforce specific computational strategies introduced in class, offering adjustable scaffolding. They provide immediate, individualized feedback that is often difficult to replicate with traditional pencil-and-paper exercises. The ability to modify difficulty levels enhances motivation. It is a valuable educational resource.”
• Z. R. Prowell, Highlands Elementary, Edina, Minnesota, USA: “In my classroom, I utilize these apps to guide students through the steps involved in multiplication techniques such as partial products and quotients. Some students still require additional guidance after viewing my demonstrations; however, after using the app, they often say, ‘Now I get it.’ Features allowing students to select potential solutions at each step support those mastering their multiplication facts. Furthermore, animations offer clear visual explanations of the processes involved in different multiplication methods.”

The Grid Multiplication Method

This approach involves decomposing numbers into their tens and units—for example, 39 decomposes into 30 and 9, while 24 decomposes into 20 and 4—and organizing them within a grid format. Multiplying corresponding headers computes each cell’s partial product (such as 600, 180, 120, and 36), which are subsequently summed to reach the final result.

User Experience and Functionality

The application automates the alignment of numbers to streamline focus on solving each partial operation. After completing calculations for each cell, correct answers are visually guided into their designated positions. Incorrect selections result in answer options appearing above the keyboard without affecting the grid’s layout.

Customizable Settings

• Input numbers can vary from two to three digits.
• The app allows for both random and custom problem generation.
• The current operation can be hidden for focused practice.
• Operands within the current operation can be highlighted.
• The interface’s color scheme is customizable.
• Animation speed can be adjusted to preference.

Additional iDevBooks Math Applications

The suite of iDevBooks math apps has received endorsements from Wired.com, IEAR.org, Edudemic.com, Teachers with Apps, among other reputable organizations. Other titles include Column Addition, Long Multiplication, Long Division, Column Subtraction, Visual Multiplication Table, Partial Differences Subtraction, Partial Products Multiplication, Partial Sums Addition, Decimal Rounding, and more.

User Feedback and Enhancement Opportunities

Constructive feedback and suggestions for future features are welcomed via idevbooks.com.

Privacy Policy

This application does not feature advertisements or in-app purchases; it does not transmit any user data during operation and contains no external links or references to other applications or websites.