The addition of natural numbers
Operations with natural numbers I
 

10. Complete this three-pointed magic star.  
  Esta unidad interactiva requiere la máquina virtual de Java J2RE.

This three-pointed star is formed with natural numbers from 0 to 8.

The sum of the three numbers on each segment is 12 (a segment consists of three numbers on a coloured line)

You can begin by putting the numbers on the segments where only one is needed.

 

  Esta unidad interactiva requiere la máquina virtual de Java J2RE.

This exercise is more difficult than the previous one because you must solve the whole star. Try it, you will certainly manage to do it.

Put the numbers on the cross of the segments so that the sum of the three number in each segment is equal to the indicated result.

Every time you click on Init new numbers with a different sum will appear.

       
           
  Eduardo Barbero Corral
 
Spanish Ministry of Education. Year 2007
 
 


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