The counting-up subtraction app lets students solve subtraction problems by counting up from the lesser number step by step. The first step is to get to the nearest multiple of 10. Then to the next higher 100 and so on until the greater number is reached. The count-up amounts are then added together to get the difference.
- The numbers can have up to 3 digits
- You can set your own problems
- The current operation for each column can be hidden
- The operands for the current operation can be highlighted
- Three different themes
- Native interfaces for iPhone, and iPad
Counting-Up Subtraction with 3-digit numbers
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Counting-Up Subtraction in the Apple VPP Store for Education
The Volume Purchase Program allows participating educational institutions to purchase iDevBooks math apps in volume and distribute them to students. All iDevBooks math apps offer special 50% discount for purchases of 20 apps or more for participating educational institutions.