\(\left(-5\right).\dfrac{1}{3}=\dfrac{-5}{3}\)

=\(-\dfrac{5}{3}\)

~ - 5/3 nhaa

\(\frac{17}{33}.\frac{2}{5}+\frac{3}{5}.\frac{17}{33}-\frac{17}{33}\)

\(=\frac{17}{33}\times\frac{2}{5}+\frac{3}{5}\times\frac{17}{33}-\frac{17}{33}\times1\)

\(=\frac{17}{33}\times\left(\frac{2}{5}+\frac{3}{5}-1\right)\)

\(=\frac{17}{33}\times\left(1-1\right)\)

\(=\frac{17}{33}\times0=\frac{17}{33}\)

 Làm he LÀM đi bạ nó lại  cồn bỏ bỏ

h: \(\dfrac{1}{1\cdot2}+\dfrac{1}{2\cdot3}+...+\dfrac{1}{9\cdot10}\)

\(=1-\dfrac{1}{2}+\dfrac{1}{2}-\dfrac{1}{3}+...+\dfrac{1}{9}-\dfrac{1}{10}\)

\(=1-\dfrac{1}{10}=\dfrac{9}{10}\)

m: \(\dfrac{1}{6}+\dfrac{1}{12}+\dfrac{1}{20}+\dfrac{1}{30}+\dfrac{1}{42}+\dfrac{1}{56}\)

\(=\dfrac{1}{2\cdot3}+\dfrac{1}{3\cdot4}+\dfrac{1}{4\cdot5}+\dfrac{1}{5\cdot6}+\dfrac{1}{6\cdot7}+\dfrac{1}{7\cdot8}\)

\(=\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{3}-\dfrac{1}{4}+\dfrac{1}{4}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{6}+\dfrac{1}{6}-\dfrac{1}{7}+\dfrac{1}{7}-\dfrac{1}{8}\)

\(=\dfrac{1}{2}-\dfrac{1}{8}=\dfrac{3}{8}\)

\(\frac{3}{7}\times\frac{1}{3}+\frac{3}{7}\times\frac{4}{3}-\frac{3}{7}\times\frac{1}{9}\)

\(\frac{3}{7}\times\left(\frac{1}{3}+\frac{4}{3}-\frac{1}{9}\right)\)

\(\frac{3}{7}\times\left(\frac{5}{3}-\frac{1}{9}\right)\)

\(\frac{3}{7}\times\left(\frac{45}{27}-\frac{3}{27}\right)\)

\(\frac{3}{7}\times\frac{14}{9}\)

\(\frac{2}{3}\)

\(\frac{7}{15}\times\frac{6}{5}+\frac{3}{5}\times\frac{6}{5}-\frac{17}{30}:\frac{5}{6}\)

\(\frac{7}{15}\times\frac{6}{5}+\frac{3}{5}\times\frac{6}{5}-\frac{17}{30}\times\frac{6}{5}\)

\(\left(\frac{7}{15}+\frac{3}{5}-\frac{17}{30}\right)\times\frac{6}{5}\)

\(\left(\frac{14}{30}+\frac{18}{30}-\frac{17}{30}\right)\times\frac{6}{5}\)

\(\frac{1}{2}\times\frac{6}{5}\)

\(\frac{3}{5}\)

Chúc bạn học tốt !!!

\(\frac{1}{5}\div\frac{1}{10}-\frac{1}{3}\cdot\left(\frac{6}{5}-\frac{9}{4}\right)^2=2-\frac{1}{3}\cdot-\frac{21}{20}^2\)

\(=2-\frac{1}{3}\cdot\frac{441}{400}\)

\(=2-\frac{147}{400}=\frac{800}{400}-\frac{147}{400}=\frac{653}{400}\)

Chúc chị/anh học tốt.

\(\frac{1}{5}:\frac{1}{10}-\frac{1}{3}\left(\frac{6}{5}-\frac{9}{4}\right)^2\)

\(=2-\frac{1}{3}\left[\frac{\left(-21\right)}{20}\right]^2\)

\(=2-\frac{1}{3}\cdot\frac{441}{400}\)( số âm. số âm = số dương )

\(=2-\frac{147}{400}\)

\(=\frac{800-147}{400}\)

\(=\frac{653}{400}=1\frac{253}{400}=1,6325\)

\(\frac{1}{5}:\frac{1}{10}-\frac{1}{3}\left(\frac{6}{5}-\frac{9}{4}\right)^2\)

\(=\frac{1}{5}.10-\frac{1}{3}\left(\frac{24}{20}-\frac{45}{20}\right)^2\)

\(=2-\frac{1}{3}\left(\frac{-21}{20}\right)^2\)

\(=2-\frac{1}{3}.\frac{441}{400}\)

\(=2-\frac{147}{400}\)

\(=\frac{800}{400}-\frac{147}{400}\)

\(=\frac{653}{400}\)

a: 5/7+5/4

=20/28+35/28=55/28

b: 3/2-4/6

=9/6-4/6=5/6

c: 5x3/4=15/4

d: 4/6:8=2/3x1/8=2/24=1/12

5/7+5/4 =55/28

3/2-4/6=5/6

5x3/4=15/4

4/6:8=1/12

Lá cây xào xạc rơi từ trên cao xuống

--> Mở rộng thành phần Vị Ngữ