(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

(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

=994 095 nha em

994995 nha

chị bấm nhầm 11nuts á. kết qquàlaf 994 995

\(A=\frac{\frac{4}{111}+\frac{4}{123}-\frac{4}{999}}{\frac{2}{111}+\frac{2}{123}+\frac{2}{999}}\)

\(=\frac{4.\left(\frac{1}{111}+\frac{1}{123}+\frac{1}{999}\right)}{2.\left(\frac{1}{111}+\frac{1}{123}+\frac{1}{999}\right)}\)

\(=\frac{4}{2}=2\)

\(\frac{\frac{4}{111}+\frac{4}{123}+\frac{4}{999}}{\frac{2}{111}+\frac{2}{123}+\frac{2}{999}}=\frac{4.\left(\frac{1}{111}+\frac{1}{123}+\frac{1}{999}\right)}{2.\left(\frac{1}{111}+\frac{1}{123}+\frac{1}{999}\right)}=\frac{4}{2}=2\)

\(=\frac{2\left(\frac{2}{111}+\frac{2}{123}+\frac{2}{999}\right)}{\frac{2}{111}+\frac{2}{123}+\frac{2}{999}}\)

\(=2\)

x+999=1111

    x    =1111-999

    x    =112

x + 999 = 1000 + 111

x + 999 = 1111

x           = 1111 - 999

x           = 112

nếu đúng mk nha ủng hộ mk nha mn kb mk đi

x + 999 = 1000 + 111

x + 999 = 1111

x = 1111 - 999

x = 112

không =)

đúng rồi

sai bét:D

999:999=1

\(=\frac{4.\left(\frac{1}{111}+\frac{1}{123}-\frac{1}{999}\right)}{2.\left(\frac{1}{111}+\frac{1}{123}-\frac{1}{999}\right)}=\frac{4}{2}=2\)

Sửa đề lại rồi đó hả bạn?!

\(=\frac{4}{111}:\frac{2}{111}+\frac{4}{123}:\frac{2}{123}-\frac{4}{999}:\frac{2}{999}\)

\(=\frac{4}{111}\times\frac{111}{2}+\frac{4}{123}\times\frac{123}{2}-\frac{4}{999}\times\frac{999}{2}\)

\(=2+2-2\)

\(=2\)

:))

999 - 111

=111 x (9 - 1)

=111 x 8

=888

999-11=888

tích mình mình tích lại

999 - 111 = 888 

Tích nha