The division-minus sign is a (usually horizontal)dash betweendots, which is used for both subtraction and division. Its use for subtraction is visually more distinct from a hyphen than is the anglophone minus sign⟨−⟩. In some scribal traditions, in its use as a minus sign, it is set at an angle,⟨⁒⟩(commercial minus sign).
2009, Blair Madore,GRE Math Workbook (in English), Barron's Educational Series,→ISBN,page73:
Since decimal numbers are based on powers of ten it is extremely easy to multiply or divide by 10ⁿ, wheren is a positive integer. To multiply a number by 10ⁿ, just move the decimal placen places to the right. For example, 24.345 × 10² = 2,434.5.[…] To divide a number by 10ⁿ, just move the decimal placen places to the left. For example, 24.345÷ 10² = 0.23345.
Division sign on Wikipedia.Wikipedia