Description of Ketten rechnen free
Practise mental arithmetic, you train your short term memory and improve your concentration!
What is a chain account?
Each chain begins with an account of normal arithmetic problem (eg "1 +3"). The result must be kept in mind, because it is followed by another operation (eg, "+3"), which must be calculated in each case to the previous result. The new intermediate result you notice is also back for the next operation, etc.
Thus, the "accountability chain" extended more and more.
Example 1 +3 (= 4), 3 + (= 7) -2 (= 5), * 2 (= 10), -8 (= 2).
With each level reduces the time that you have available for an arithmetic operation to fractional seconds.
How long can you keep up?
The difficulty level can be adjusted at any time, so that children can practice excellent.
- Adjustable speed limit
- Adjustable time between arithmetic operations
- 2 levels of allowed operators (only + and -) or (+, -, x, and:)
- Global Leaderboards for each difficulty level.
App permissions:
For the global ranking app needs access to the Internet.