\(A=\frac{2}{7}+\frac{-3}{8}+\frac{11}{7}+\frac{1}{3}+\frac{1}{7}+\frac{5}{-8}\)

\(A=\left(\frac{2}{7}+\frac{11}{7}+\frac{1}{7}\right)+\left(\frac{-3}{8}+\frac{5}{-8}\right)+\frac{1}{3}\)

\(A=2-1+\frac{1}{3}\)

\(A=\frac{4}{3}\)

\(B=\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+17\)

\(B=\left(\frac{3}{17}+\frac{14}{17}\right)+\frac{-5}{13}+\frac{-18}{35}+17\)

\(B=1+\frac{-5}{13}+\frac{-18}{35}+17\)

\(B=18+\frac{-5}{13}+\frac{-18}{35}\)

\(B=\frac{7781}{455}\)

a)\(-\frac{6}{7}< \frac{3}{7}< \frac{18}{7}\)

b) \(\frac{17}{35}>\frac{17}{53}\)

c) \(\frac{17}{35}< \frac{17}{-35}\)

d) Ta có : \(\frac{12}{7}=\frac{60}{35}\)

                  \(\frac{17}{5}=\frac{85}{35}\)

          \(\Rightarrow\frac{12}{7}< \frac{17}{5}\)

a)\(\frac{3}{7}\)>\(\frac{18}{7}\)>\(\frac{-6}{7}\)

b)\(\frac{17}{35}\)>\(\frac{17}{53}\)

c)\(\frac{17}{35}\)<\(\frac{17}{-35}\)

d)\(\frac{12}{7}\)<\(\frac{17}{5}\)

hok tốt

a ) \(-\frac{6}{7}< \frac{3}{7}< \frac{18}{7}\)

b ) \(\frac{17}{35}>\frac{17}{-35}\)

c ) \(\frac{17}{35}>\frac{17}{53}\)

d ) \(\frac{12}{7}< \frac{17}{5}\)

\(C=\left|-3\left(\dfrac{-13}{15}-\dfrac{17}{21}\right)\right|-\left|\dfrac{-13}{15}+\dfrac{17}{7}\right|+\left(-12+\dfrac{35}{3}\right):\left|-\dfrac{7}{6}\right|\\ =\left|-3.-\dfrac{176}{105}\right|-\left|-\dfrac{6}{35}\right|+\left(-\dfrac{1}{3}\right):\dfrac{7}{6}\\ =\dfrac{176}{35}-\dfrac{6}{35}-\dfrac{1}{3}:\dfrac{7}{6}\\ =\dfrac{176}{35}-\dfrac{6}{35}-\dfrac{2}{7}\\ =\dfrac{170}{35}-\dfrac{2}{7}=\dfrac{32}{7}.\)

tính giúp mình với mình đang cần gấp

mình còn ko bt cơ mà mai nộp r

mik chỉ lm đc 1 câu thôi mong bn like cho
(13911:3849−5211:3849):(4938.511)={(13+911).4938−(5+211).4938}:(4938.511)=4938.(13−5+911−211):(4938.511)=4938.(8+711):(4938.511)=(8+711):511=19

Đáp án : A

k minh minh tra loi nhanh nhat . ket ban voi minh nhe

Thank, đúng rồi :)))...

a ) 11/125

b ) 1