The multiplication of natural numbers
Operations with natural numbers II
 
12. Complete this multiplication three-pointed magic star.
  Esta unidad interactiva requiere la máquina virtual de Java J2RE.

For this activity you need a piece of paper and a pencil.

Put the numbers below into the empty cells to complete this three-pointed magic square.

The product of the numbers in each segment must be the one  shown in blue.

You can begin by completing the segments where only one number is needed.
       
           
  Eduardo Barbero Corral
 
Spanish Ministry of Education. Year 2007
 
 

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