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[[File:Abacus1of2.jpg]][[File:Abacus2of4.jpg]] [[File:Abacus3of6.jpg]] [[File:Abacus4of8.jpg]] [[File:Abacus5of10.jpg]] [[File:Abacus6of12.jpg]]
 
[[File:Abacus1of2.jpg]][[File:Abacus2of4.jpg]] [[File:Abacus3of6.jpg]] [[File:Abacus4of8.jpg]] [[File:Abacus5of10.jpg]] [[File:Abacus6of12.jpg]]
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To make 1/2 just using one string, the fraction denominator must be divisible by 2. The string must contain an even number of beads, 2 4 6 8 10 12
       
Ways to make 1/2 with more than one string
 
Ways to make 1/2 with more than one string
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1/3 + 1/6
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1/3 + 2/12
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1/4 + 1/6 + 1/12
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1/4 + 2/8
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1/4 + 3/12
2,486

edits