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Listed under: Mathematics > Number (Mathematics) > Numeral systems > Place value

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Numbers Count: Importance of zero

TLF-IDM020069

How important is zero in place value? How would you write '50' if there was no zero?

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BTN: What is an abacus?

TLF-IDM021154

An abacus is a tool that helps people solve maths problems. Why might some people still use, and encourage the use of, an abacus when there are more contemporary tools like calculators?