Question

What are the butterfly numbers

Answer 1

Answer:

Decimal numbers are called butterfly number in abacus.

Step-by-step explanation:

Centuries before adoption of Hindu–Arabic numeral system the abacus, also known as counting frame, a calculating tool was used in the ancient Near East, China, Europe and Russia. It contains a string with beads that are used for counting.

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Answer 2

Answer:

Decimal numbers are called butterfly number in abacus.

Step-by-step explanation:

Centuries before adoption of Hindu–Arabic numeral system the abacus, also known as counting frame, a calculating tool was used in the ancient Near East, China, Europe and Russia. It contains a string with beads that are used for counting.