Same-Change Subtraction

Same-Change Subtraction

iOS iPhone Education

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In the Same-Change Subtraction app the user can keep adding or subtracting the same amount from both numbers until the subtraction problem can be solved easily.

The same-change rules states that If you subtract or add the same number from both parts of a subtraction problem, the difference remains the same. A subtraction problem 667 – 289 is easier to solve if it is changed into 678 – 300.


- The numbers can have up to 3 digits
- You can set your own problems
- Three different themes
- Native interfaces for iPhone, and iPad

Other iDevBooks math apps

iDevBooks math apps have been reviewed and endorsed by, Common Sense Media, and other respected sites and organizations.

Some of the over 40 other iDevBooks math apps are Visual Multiplication Table, Decimal Rounding, Whole Number Rounding, Column Subtraction, Column Addition, Long Division, Long Multiplication, Lattice Multiplication, Fraction Math, Partial Differences Subtraction, Partial Quotients Division, Partial Sums Addition, etc.

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

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What's New

- support for iOS 13
- new interface with support for latest iPad and iPhone models
- new theme colors

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