Question

Thay bằng các số thích hợp

Answer 1

\(\overline{abc}\times9=\overline{1abc}\)

\(\overline{abc}\times9=1000+\overline{abc}\)

\(\overline{abc}\times8=1000\)

\(\overline{abc}=1000:8=125\)

Answer 2

\(\overline{ab}+370=\overline{ab1}\)

\(\overline{ab}+370=\overline{ab}\times10+1\)

\(370=\overline{ab}\times9+1\)

\(369=\overline{ab}\times9\)

\(\overline{ab}=369:9=41\)