a)\(\frac{1313}{1515}=\frac{13\times101}{15\times101}=\frac{13}{15}\)

\(\frac{1326}{1428}=\frac{1326:102}{1428:102}=\frac{13}{14}\)

DO  \(\frac{13}{14}>\frac{13.}{15}\)   nên    \(\frac{1326}{1428}>\frac{1313}{1515}\)

\(b\))\(\frac{222}{555}\)  và    \(\frac{333}{444}\)

\(\frac{222}{555}=\frac{2\times111}{5\times111}=\frac{2}{5}\)

\(\frac{333}{444}=\frac{3\times111}{4\times111}=\frac{3}{4}\)

DO    \(\frac{2}{5}< \frac{3}{4}\)  nên    \(\frac{222}{555}< \frac{333}{444}\)

111 + 111 = 222

222 + 222 = 444

333 + 333 = 666

444 + 444 = 888

555 + 555 = 1110

111+111=222

222+222=444

333+333=666

444+444=888

555+555=1110

Tham khảo nha bạn

(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2.................999 x 2 x 2 x 2 ?

A.(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2 > 999 x 2 x 2 x 2 = 9990 > 7992

B.(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2 < 999 x 2 x 2 x 2 = 9990 < 7992

C.(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2 = 999 x 2 x 2 x 2 = 9990 = 7992

Đáp án A nhé

333-222=111
111+444=555
555-555=0
0+666=666
hc tốttttttttttt

\(333-222=111\)

\(555-555=0\)

\(111+444=555\)

\(0+666=666\)

\(333^{333}=3^{333}.111^{333}\)

\(555^{222}=5^{222}.111^2\)

\(3^{333}=27^{111}>5^{222}=25^{111}\) (1)

\(111^{333}>111^{222}\)(2)

Từ (1) và (2) \(\rightarrow333^{333}>555^{222}\)

1665 nha em

111 + 222 + 333 + 444 + 555 = 1665

1110 + 1110 + 1110 + 1110 + 1110 = 5550

ko rảnh nha thằng kia