4 The first known counting device.
a Abacus
b. Leibnitz Machine
Napier's Bone
d. Side Rule
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4 The first known counting device.
a Abacus
b. Leibnitz Machine
Napier's Bone
d. Side Rule
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Answer:
a. Abacus
Explanation:
The Earliest Recorded calculating device is the Abacus.
Answer:
A. Abacus
Explanation:
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