\(=\dfrac{8}{11}\left(\dfrac{19}{35}+\dfrac{16}{35}\right)-\dfrac{9}{11}=\dfrac{8}{11}-\dfrac{9}{11}=-\dfrac{1}{11}\)

19/35 . 8/11 + 16/11 . 8/35 - 9/11

= 152/385 + 128/385 - 9/11

= 8/11 - 9/11

= -1/11

sai mong pẹn thông cảm:>

Đáp án cần chọn là: B

\(\dfrac{19}{28}+\dfrac{23}{47}-\dfrac{15}{8}+\dfrac{9}{28}+\dfrac{24}{47}\)

\(=\left(\dfrac{19}{28}+\dfrac{9}{28}\right)+\left(\dfrac{23}{47}+\dfrac{24}{47}\right)-\dfrac{15}{8}\)

\(=\dfrac{28}{28}+\dfrac{47}{47}-\dfrac{15}{8}\)

\(=1+1-\dfrac{15}{8}\)

\(=\dfrac{1}{8}\)

____________________

\(\dfrac{30}{11}+\dfrac{12}{35}-\dfrac{19}{11}-\dfrac{2}{35}-\dfrac{2}{7}\)

\(=\left(\dfrac{30}{11}-\dfrac{19}{11}\right)+\left(\dfrac{12}{35}-\dfrac{2}{35}\right)-\dfrac{2}{7}\)

\(=\dfrac{11}{11}+\dfrac{10}{35}-\dfrac{2}{7}\)

\(=1+\dfrac{2}{7}-\dfrac{2}{7}\)

\(=1\)

=35(134-12-22)=3500

=35(134-12-22)=3500

\(35\times11+11\times17+11\)

\(=11\times\left(35+17+1\right)\)

\(=11\times53\)

\(=583\)

k mk nha

thank you very much

35 * 11 + 11 * 17 + 11

= 35 * 11 + 11 * 17 + 11 * 1

= 11 * ( 35 + 17 + 1 )

= 11 * 53

= 583

Bài này quá dễ 

583 nha

tk mik nhé

\(\frac{-35}{107}-\left(\frac{11}{30}+\frac{35}{107}\right)=-\frac{35}{107}-\frac{2227}{3210}=-\frac{3277}{3210}\)

dùm

\(-\frac{12}{35}\div\frac{7}{11}-\frac{23}{35}\div\frac{7}{11}-\frac{5}{11}\)

\(=\left(-\frac{12}{35}-\frac{23}{35}\right)\div\frac{7}{11}-\frac{5}{11}\)

\(=-1\div\frac{7}{11}-\frac{5}{11}\)

\(=-\frac{11}{7}-\frac{5}{11}\)

\(=-\frac{156}{77}\)

\(2-\frac{11}{9}\div\frac{5}{14}-\frac{7}{9}\times\frac{14}{5}\)

\(=2-\frac{154}{45}-\frac{98}{45}\)

\(=-\frac{64}{45}-\frac{98}{45}\)

\(=-\frac{18}{5}\)