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| Number Invaders - Add | 
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2004 | 
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| Freeware | 
Educational | 
Space invaders | 
 
 
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| by: Rob Somerville | 
HOME | 
68 % | 
 
| Windows | 
English | 
 
|  Tested on winXP: runs fine | 
last updated: 20-04-09 | 
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Number Invaders - Add |  |   | 
 English:
  
Making sums while playing Space Invaders
  
Based on Space Invaders where the invaders are numbers that can only be destroyed if the correct answers can be calculated. In Invaders Add the teacher or student chooses how high the answer to each calculation can be. The questions are asked at the top of the screen and the student answers by shooting down the correct answers.
  
You can select a difficulty level (sum up to 10, 20, ..100)
  
Controls: 
Arrow keys = move 
Space = shoot 
Esc = exit game
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   Click here to see the statistics of this game 
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