Why do you think
abacus is an important calculating device?
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can't imagine counting without numbers, but there was a time when no written numbers. ... This simple calculating device helped to count large numbers and use of both parts of brain, thus helping a child from converting from intelligent to genius.
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The abacus, also called a counting frame. We can't imagine counting without numbers, but there was a time when no written numbers. ... This simple calculating device helped to count large numbers and use of both parts of brain, thus helping a child from converting from intelligent to genius...
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