Theo thứ tự từ bé đến lớn: \(\frac{3}{7}\);\(\frac{1}{2}\);\(\frac{3}{5}\).

Theo thứ tự từ lớn đến bé: \(\frac{3}{2}\);\(\frac{3}{4}\);\(\frac{2}{3}\);\(\frac{1}{5}\).

k cho mình nha

3/7 1/2 3/5
3/2 3/4 2/3 1/5

ghi rõ ra được ko

\(\left[\frac{139}{84}-\frac{577}{924}-\frac{98}{205}\right].\frac{2197}{27}\)

\(\left[\frac{34}{33}-\frac{98}{205}\right]\frac{2197}{27}\)

\(\frac{3736}{6765}.\frac{2197}{27}=44,93713285\)

a ) \(5\frac{3}{4}:3+2\frac{1}{4}.\frac{1}{3}-\frac{3}{8}=\frac{23}{4}:\frac{3}{1}+\frac{9}{4}.\frac{1}{3}=\frac{23}{12}+\frac{3}{4}=\frac{8}{3}\)

b ) \(\frac{3}{5}:\frac{5}{6}:\frac{6}{7}:\frac{7}{8}+\frac{7}{8}+\frac{2}{5}+\frac{23}{35}=\frac{3.6.7.8}{5.5.6.7}+\frac{7}{8}+\frac{2}{5}+\frac{23}{35}=\frac{24}{25}+\frac{7}{8}+\frac{2}{5}+\frac{23}{35}=\frac{4049}{1400}\)

a) =  \(\frac{23}{4}:3+\frac{9}{4}x\frac{1}{3}-\frac{3}{8}\)

= ....

(bn tự giải nhé, mk đã làm thành phân số cho bn r`)

b) tương tự như câu a nhé

nha bn

Ta có : 

\(\frac{\frac{2}{5}-\frac{2}{9}+\frac{2}{11}}{\frac{7}{5}-\frac{7}{9}+\frac{7}{11}}-\frac{\frac{1}{3}-\frac{1}{4}+\frac{1}{5}}{\frac{7}{6}-\frac{7}{8}+\frac{7}{10}}\)

\(=\)\(\frac{2\left(\frac{1}{5}-\frac{1}{9}+\frac{1}{11}\right)}{7\left(\frac{1}{5}-\frac{1}{9}+\frac{1}{11}\right)}-\frac{\frac{1}{3}-\frac{1}{4}+\frac{1}{5}}{\frac{7}{2}\left(\frac{1}{3}-\frac{1}{4}+\frac{1}{5}\right)}\)

\(=\)\(\frac{2}{7}-\frac{1}{\frac{7}{2}}\)

\(=\)\(\frac{2}{7}-\frac{2}{7}\)

\(=\)\(0\)

Chúc bạn học tốt ~ 

thank nha

k cho mk nhé .OK

1/3xD=1/(2x4)+1/(4x6)+...+1/(98x100)
2/3xD=2/(2x4)+2/(4x6)+...+1/(98x100)
2/3xD= 1/2-1/4+1/4-1/6+...+1/98-1/100
2/3xD=1/2-1/100
2/3xD=49/100
D=147/200

 

A=1/2+1/3+1/6+1/12
A=(1/2+1/3+1/6)+1/12
A=1+1/12
A=13/12

B=20/3+61/8+10/3+37/8
B=30/3+98/8
B=10+49/4
B=89/4

a)\(\frac{2}{3}+\frac{3}{4}+\frac{1}{6}=\frac{19}{12}\); b)\(2\frac{1}{10}-\frac{3}{4}-\frac{2}{5}=\frac{3}{4}\)c)\(\frac{1}{3}-\frac{1}{5}=\frac{2}{15}\)d) \(\frac{1}{5}-\frac{1}{7}=\frac{2}{35}\)