Partial Sums Addition7.0 - App Store

Partial Sums Addition helps students learn and practice the partial sums addition method step by step.

The app gives students a visual way to add numbers by working with each place value separately. The partial sums are then combined to find the final answer.

Students can solve randomly generated problems or enter their own addition problems. The number of digits can be adjusted for different skill levels.

The Partial Sums Method:

In the partial sums method, each place value is added separately from left to right. For example, in 764 + 340, the partial sums are 1000, 100, and 4. These are then added together to get the final answer: 1104.

Wired.com:
“Esa Helttula’s apps are all fantastic for math learning and practice, and aren’t cluttered with mini-games, incentives, or annoying music.”

Teacher endorsement:

“The math apps by Esa Helttula allow students to practice and reinforce the specific computation strategies taught in class, with as much or as little scaffolding as necessary. They also provide individualized feedback to each student, with an immediacy that is not always possible through pencil and paper practice.”
- R. Zeni, Ecole Sandy Hill Elementary, Abbotsford, BC, Canada

Easy to Use:

The numbers are aligned automatically so students can focus on solving each column. After the student solves the operation for each column, the correct answer moves into the right place. If the student presses the wrong button, the answer appears above the keyboard but does not move.

Features:

- Step-by-step partial sums addition practice
- Add 2 or 3 numbers
- Each number can have 2-3 digits
- Randomly generated or manually entered problems
- Current operation for each column can be hidden
- Operands of the current operation can be highlighted
- Customizable interface colors
- Adjustable animation speed
- Custom interfaces for iPhone and iPad

Other iDevBooks Math Apps:

Other iDevBooks math apps include Column Addition, Long Multiplication, Long Division, Column Subtraction, Visual Multiplication Table, Partial Differences Subtraction, Partial Products Multiplication, Partial Quotients Division, Decimal Rounding, and more.

Feedback:

New ideas to make this app better are welcome. Please visit idevbooks.com to give feedback.

Privacy:

This app has no ads, no in-app purchases, and does not transmit user data during operation. The app also does not contain links to other apps or to the web.

Version History Updated for iOS 26 compatibility. 7.0 Jun 23 - support for iOS 15 6.5 10/19/2021 - support for iOS 13
- new interface with support for latest iPad and iPhone models
- new theme colors 6.0 09/30/2019 - support for iOS 12
- support for iPhone Xr and Xs Max
- minor bug fixes 5.2 11/12/2018 - support for iOS 11
- support for iPhone X 5.1 03/21/2018 - open worksheets from app (new worksheets can be made on the iDevBooks.com site)
- support for iOS 10.0
- support for shared iPad in school environments

For more information about worksheets and other new features of this version please visit idevbooks.com. Please also get in contact if you have any feedback or you want information about 32 iDevBooks math apps. 5.0 02/15/2017 - support for iOS 9.3

Please visit iDevBooks.com if you have any feedback or you want information about 26 iDevBooks math apps. 4.0 04/09/2016 - minor interface changes
- new icon 3.0 09/11/2014 Interface updates for iOS 7.

If you have any feedback please visit idevbooks.com. There are now 25 iDevBooks math apps. 2.4 10/11/2013 -The web link to support pages has been removed to prevent users from accidentally launching the browser.
-There are also some minor interface changes.

If you have any feedback please visit idevbooks.com. There are now 24 iDevBooks math apps. 2.3 06/20/2013 Support for iPhone 5 and iOS 6.

Please visit http://idevbooks.com if you have feedback or questions. 2.2 10/11/2012 - Sometimes the digits were not aligned properly
- Other minor bug fixes

For feedback and information about 16 other math apps please visit http://idevbooks.com 2.1 03/10/2012 - The app is now universal and it has custom interfaces for iPhone and iPad
- On the iPad the app can be used in portrait or landscape orientation
- Please give feedback and get information about 18 other math apps by visiting http://idevbooks.com 2.0 01/30/2012 Minor bug fixes.

If you would like to give feedback, ask for new features, or see my 17 other math apps please visit http://idevbooks.com 1.4 09/13/2011 In some cases the keyboard remained visible after setting custom problems.

If you would like to give feedback, ask for new features, or see my other 17 math apps please visit http://idevbooks.com 1.3 01/25/2011 - You can now solve custom and random problems
- Support for fast app switching in iOS 4
- New icon
- Some minor interface changes

If you have any questions, requests for new features or would like to see my 17 other math apps please visit http://idevbooks.com 1.2 01/10/2011 1.0 01/28/2010