$(8 \times 10^{6}) \div (2 \times 10^{-3}) = ?$

$(8 \times 10^{6}) \div (2 \times 10^{-3}) = ?$
  1. $4 \times 10^{3}$
  2. $4 \times 10^{9}$
  3. $4 \times 10^{-9}$
  4. $16 \times 10^{9}$

Solution

$\dfrac{8}{2} \times 10^{6-(-3)} = 4 \times 10^{9}$.

Asked in: IMO

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