Activities/Abacus: Difference between revisions
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File:Custom-abacus.png|custom, as shown: octal (base 8) | File:Custom-abacus.png|custom, as shown: octal (base 8) | ||
</gallery> | </gallery> | ||
=== The toolbars === | |||
<Image:Abacus-main-toolbar.png|left> | |||
From left to right: | |||
:project-toolbar button | |||
:saupan button (Chinese abacus) | |||
:soroban button (Japanese abacus) | |||
:schety button (Russian abacus) | |||
:nepohualtzintzin button (Mayan abacus) | |||
:binary button (binary abacus) | |||
:hexadecimal button (hexadecimal abacus) | |||
:customization-toolbar button | |||
:stop button not shown | |||
<Image:Abacus-custom-toolbar.png|left> | |||
From left to right: | |||
:select the number of rods | |||
:select the number of beads on the top of the frame | |||
:select the number of beads on the bottom of the frame | |||
:select the multiplication factor of top beads (e.g., on the Chinese abacus, each top bead counts as 5× the value of a bottom bead on the same rod) | |||
:select the base to determine the value of bottom beads across rods; this is 10 on most conventional abacuses, but 20 on the Mayan abacus and 2 on the binary abacus. | |||
== How to use an abacus == | == How to use an abacus == | ||