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1280÷2.0=? The correct answer to this problem in proper number of significant digits is

Answer»

`64`
`6.40xx10^(2)`
`640.0`
`640`

Solution :`UNDERSET("Three//four S.F.")(1280)÷underset("Two S.F.")(2.0)=underset("Three//two S.F.")(640)`
The answer should two significant DIGITS.


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