Activities/Abacus: Difference between revisions
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File:Nepohualtzintzin.png|nepohualtzintzin (Mayan) | File:Nepohualtzintzin.png|nepohualtzintzin (Mayan) | ||
File:Binary.png|binary (base 2) | File:Binary.png|binary (base 2) | ||
File:Hexadecimal.png|hexadecimal (base 16) | |||
File:Fraction.png|fractions (1/2, 1/3, 1/4,...) | File:Fraction.png|fractions (1/2, 1/3, 1/4,...) | ||
File:Custom-abacus.png|custom, as shown: octal (base 8) | |||
</gallery> | </gallery> | ||