Video of The Partial Differences Subtraction App |
The Partial Differences Subtraction App for iPhone and iPod Touch
This app can be used to teach and study the partial differences subtraction 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 subtraction problems. The number of digits in the numbers can be set.
The Partial Differences Subtraction Method
The partial differences subtraction method is a two-step process. In the example 936 - 580, each place value is first subtracted separately from left to right. The partial differences are added and 400 - 50 + 6 produces the answer 356.
In the Everyday Mathematics curriculum the partial differences method is one of the algorithms for subtraction.
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.
- 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.
Feedback and Requests for New Features
Please give feedback about this program.
My other apps
My trational mathematics apps are Long Multiplication, Long Division, Column Subtraction and Column Addition.
For "new maths" or Everyday Mathematics I also have Partial Sums Addition and Trade-First Subtraction.
