a) \(\overline{ab}.101=\overline{abab}\)
b) \(\overline{abc}.7.11.13=\overline{abc}.1001=\overline{abcabc}\)
Bài làm :
\(a)ab.101\)
\(=ab.\left(100+1\right)\)
\(=ab00+ab\)
\(=abab\)
\(b)abc.7.11.13\)
\(=abc.1001\)
\(=abc.\left(1000+1\right)\)
\(=abc000+abc\)
\(=abcabc\)
Học tốt nhé
a) ab . 101 b) abc . 7. 11. 13
= ab . ( 100 + 1) = abc . 1001
= ab. 100 + ab .1 = abc . ( 1000 + 1)
= ab00 + ab = abc . 1000 + abc . 1
= abab = abc000 + abc
= abcabc
