\(\frac{85-17+34}{51-102}\)

\(=\frac{17\left(5-1+2\right)}{51\left(1-2\right)}\)

\(=\frac{17.6}{51.\left(-1\right)}\)

\(=\frac{1.6}{3.\left(-1\right)}\)

\(=\frac{1.2}{1.\left(-1\right)}\)

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

\(=-2\)

-33/1/3

e tu lan sau nh dau gach can thn vao 

a) \(\frac{-28}{72}=\frac{-7}{18}\)

b) \(\frac{-75}{-105}=\frac{75}{105}=\frac{5}{7}\)

c) \(\frac{3.5.11.13}{33.35.37}=\frac{3.5.11.13}{3.11.5.7.37}=\frac{13}{7.37}=\frac{13}{259}\)

d) \(\frac{85-17+34}{51-102}=\frac{102}{-51}=-2\)

a) \(\frac{-28}{72}=\frac{\left(-28\right):4}{72:4}=\frac{-7}{18}\)

b) \(\frac{-75}{-105}=\frac{\left(-75\right):\left(-15\right)}{\left(-105\right):\left(-15\right)}=\frac{5}{7}\)

c) \(\frac{3.5.11.13}{33.35.37}=\frac{3.5.11.13}{11.3.5.7.37}=\frac{13}{7.37}=\frac{13}{259}\)

d) \(\frac{85-17+34}{51-102}=-2\)

                 72=18.     -105=105=7

\(\frac{51}{85}=\frac{51:17}{85:17}=\frac{3}{5}\)

\(\frac{51}{85}=\frac{51:17}{85:17}=\frac{3}{5}\)

\(\frac{51}{18}=\frac{17}{6}\)

\(\frac{34}{51}\)=\(\frac{2}{3}\)

Tik mình nha bạn yêu quý!MÌnh cũng cùng tên vs bạn nè!!!

\(\frac{34}{51}\)=\(\frac{2}{3}\)

2 

3 

2/3 bn nhé

\(\frac{2}{3}\) nhớ tk nha

34/51=34:17/51:17

=2/3

k nha

51/17=51:17/17:17=3/1

3/1 nha bạn

3phan1