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

The Partial Sums Method

The partial sums addition method is a two-step process. In the example 764 + 340, each place value is first added separately from left to right. The resulting addition 1000 + 100 + 4 produces the answer 1104.

In the Everyday Mathematics curriculum the partial sums method is the focus algorithm for addition.

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 column 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.
-There can be 2 or 3 numbers to add.
-The current operation for each column 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.

Video of the app

You can see a video of the Partial Sums Addition app in action at my site idevbooks.com.

Feedback and Requests for New Features

I have made this app to be a useful teaching and learning tool for those children and parents that use the Everyday Mathematics curriculum. New ideas to make this app better are welcome.

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.

My other apps

For and Everyday math I also have the Trade-First Subtraction app.

My apps for traditional mathematics are Column Subtraction, Column Addition, Long Division and Long Subtraction.

Partial Sums Addition Screenshots