Tìm chữ số

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nuthangiotuyet

Bài 2:
$\overline{4abc}: \overline{abc}= 26$

$(4000+ \overline{abc}). \dfrac{1}{\overline{abc}}= 26$

$4000. \dfrac{1}{\overline{abc}}+ \overline{abc}. \dfrac{1}{\overline{abc}}= 26$

$4000. \dfrac{1}{\overline{abc}}+ 1= 26$

$4000. \dfrac{1}{\overline{abc}}= 25$

$ \dfrac{4000}{\overline{abc}}= 25$

$\overline{abc}= \dfrac{4000}{25}$

$\overline{abc}= 160$

\Rightarrow $a= 1, b= 6, c=0$
 
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