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Anonymous
It was invented by the Chinese in about 3000BC
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who invented subtraction?
people invented it
who invented the quarter
who invented firstinmath
abacus is the first manual mechanical calculator
it is an ancient counting machine used in China, it is still in use today
the first abacuss ever made in the world is in china in bajing about 40,000 years ago.
you go to one of the dorms such as the dungeon or the abacuss and click on earn zbucks and press shuffler and hey presto click quit then cash in money
The CD was invented in 2001 Thomas clamps invented it.
invented in 500BC before electricity was invented
Gloria Mejia invented it and she invented it in 1998
When and where were snickerdoodles invented Why were snickerdoodles invented
who invented the washboard?
Yes, the computer is invented.
Invented is the past participle of the verb invent. verb /past /past participle = invent /invented /invented