Ax1000 = 1830.11/5 - 672.22 -110.11/5 +1000

=(1830.11 -672.22.5-110.11+5000)/5

=(1830.11-6720.11-110.11+5000)/5=(1830.11-6830.11+5000)/5=(-5000.11+5000 )/5=-5000.10/5=-1000.10

vậy A = -10

\(\left(-\frac{15}{22}\div-\frac{5}{11}\right)\cdot\frac{2}{3}\)

\(=\left(-\frac{15}{22}\cdot-\frac{11}{5}\right)\cdot\frac{2}{3}\)

\(=-\frac{3}{2}\cdot\frac{2}{3}\)

\(=-1\)

(-15/22: -5/11). 2/3

= ( -15 /22 x -11 / 5 ) x 2/3

=        3/2            x  2/3 

=             6/6

=            1

\(=\left(-0,37+\frac{14}{8}\right).\left(-1.1\right)-\left(2,63-\frac{9}{24}\right).\left(-1,1\right)\)

\(=-1,1.\left(-0,37+\frac{14}{8}-2,63+\frac{9}{24}\right)\)

\(=-1,1.\left[\left(-0,37-2,63\right)+\left(\frac{14}{8}+\frac{9}{24}\right)\right]\)

\(=-1,1.\left[\left(-3\right)+\left(\frac{14}{8}+\frac{3}{8}\right)\right]\)

\(=-1,1.\left(-3+\frac{17}{8}\right)\)

\(=-1,1.\left(-\frac{7}{8}\right)\)

\(=\frac{77}{80}\)

=77\80

\(\frac{4}{3}B=-1+\frac{3}{4}-\left(\frac{3}{4}\right)^2+...+\left(\frac{3}{4}\right)^{99}\)

\(B=-\frac{3}{4}+\left(\frac{3}{4}\right)^2-\left(\frac{3}{4}\right)^3+...+\left(\frac{3}{4}\right)^{100}\)

\(\Rightarrow\)\(\frac{7}{3}B=-1+\left(\frac{3}{4}\right)^{100}\Rightarrow B=\frac{\left(\frac{3}{4}\right)^{100}-1}{\frac{7}{3}}=\frac{3\left[\left(\frac{3}{4}\right)^{100}-1\right]}{7}\)

Như vầy đủ gọn chưa bạn?

(-0,37+14/8).-11/10-(2,63-9/24).(-1,1)=77/80

ok bạn ơi

\(\frac{7}{6}+\frac{5}{6}:5-\frac{3}{8}.\left(-3\right)^2\)

\(=\frac{7}{6}+\frac{5}{6}.\frac{1}{5}-\frac{3}{8}.9\)

\(=\frac{7}{6}+\frac{1}{6}-\frac{27}{8}\)

\(=\frac{8}{6}-\frac{27}{8}\)

\(=\frac{32}{24}-\frac{81}{24}\)

\(=\frac{-49}{24}\)

Chúc bạn học tốt !!! 

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