Downloading AddOrSubtract 1.1.1.1 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. AddOrSubtract lies within Education Tools, more precisely Science Tools. This free tool was originally created by Skynergy. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
AddOrSubtract is a simple flexible and reliable math's tutor to teach your child how to do simple addition or subtract ion mathematics. Do as many math quiz questions as you want to. Specify the top and bottom number ranges to increase or decrease difficulty.
You may want to check out more software, such as Panel, gitoolbox or Mathematics Worksheet Factory, which might be similar to AddOrSubtract.