A few days ago
writing in math, how can the digit seven have different values?
writing in math, how can the digit seven have different values?
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A few days ago
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The value which the digit 7 contributes to a number depends on the position in the number of the 7.
In 2173, the seven has value 70.
In 0.4076, it has value 7 / 1000.
In 3 / 7, it has value 1 / 7.
In 19 / 74, it has value 1 / 70.
All the above numbers were written using base 10, as used in everyday life. Numbers can also be written in different bases.
Using base 8, for example, the 7 in 735 has value 7 * 8^2 rather than 7 * 10^2 which it would have in the decimal number 735.
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