英语作文:Find out when these things wewe invented and then write about whemFind out when these things wewe invented and then write about themThe abacus was invented in the sixth century by the Chinese...续写
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英语作文:Find out when these things wewe invented and then write about whemFind out when these things wewe invented and then write about themThe abacus was invented in the sixth century by the Chinese...续写
英语作文:Find out when these things wewe invented and then write about whem
Find out when these things wewe invented and then write about them
The abacus was invented in the sixth century by the Chinese...续写
英语作文:Find out when these things wewe invented and then write about whemFind out when these things wewe invented and then write about themThe abacus was invented in the sixth century by the Chinese...续写
the abacus caught on in several Mediterranean civilizations.
The abacus is a mechanical aid used for counting; it is not a calculator in the sense we use the word today.The person operating the abacus performs calculations in their head and uses the abacus to keep track of the sums,the carries,etc.
Although the art of using an abacus (and it really is an art!) is slowly dying,it is still fascinating to watch someone truly skilled in flicking the little beads around the frame.