### for iPad, iPhone, and Windows 10 PCs

This app can be used to teach and study the column addition 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 or custom addition problems with small and large numbers. The number of digits in the numbers can be set.

## Easy to Use

The numbers are aligned automatically and the user can concentrate on solving the operations for each column. Carrying is handled automatically and it is visualized using a nice animation.

After the user solves the operation for each column the correct answer will fly to the right place. The unit of the answer will fly under the column and the ten is carried over the next column.

If the user presses the wrong button the answer will appear above the keyboard but it will not move.

## The Column Addition App has the Following Settings:

• The user can add 2 or 3 numbers
• The app can provide random problems or the user can input his own numbers
• Each number can have from 1 to 5 digits
• The current operation for each column can be hidden
• The operands of the current operation can be highlighted
• The picture puzzle can be hidden
• Colors of the interface can be changed
• The speed of the animations can be set

## Review by professor Tim Pelton

Tim Pelton, assistant professor of Mathematics Education at the University of Victoria reviewed the sister app of column addition - column subtraction:

“If your child is familiar with the traditional algorithm they will likely be able to improve their mastery of the procedure using this application. With the ‘show current operation’ option turned on, they are constantly reminded of the next step, which can lead to efficient practice of the procedure. Then by turning off the current operation your child is able to practice remembering the steps on his/her own. Because no wrong entries are allowed the app provides a passive form of positive reinforcement and your child will likely improve in both confidence and competence with respect to the procedure. However, to support learning and understanding in mathematics you need to take an active role in assessing understanding and challenging your child to explain their thinking.”

The interface of Column Addition app is similar to Column Subtraction.

199 + 695

71686 + 49245

## Column Addition in the Apple VPP Store for Education

The Volume Purchase Program allows participating educational institutions to purchase iDevBooks math apps in volume and distribute them to students. All iDevBooks math apps offer special 50% discount for purchases of 20 apps or more for participating educational institutions.

Column Addition in the VPP store