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.

Features:

• The numbers can have up to 3 digits
• You can set your own problems

Other iDevBooks math apps

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

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Privacy

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.