`a. -6/14 = (-6:2)/(14:2) = -3/7` $\\$

`b. 33/(-55) = (33:(-11))/(-55:(-11)) = -3/5` $\\$

`c. 15/35 = (15:5)/(35:5) = 3/7` $\\$

` -48/-12 = (-48:(-12))/(-12:(-12)) = 4/1 = 4` $\\$

`d. (3.5.11.13)/(33.35.37) = (3.5.11.13)/(3.11.5.7.37) = 13/(7.37) = 13/259`  $\\$

`e. (85 - 17 + 34)/(51 - 102) = 102/(-51) = (102: (-51))/(-51: (-51)) = -2/1=-2`

Đáp án+Giải thích các bước giải:

$\text{a) $\frac{- 6}{14}$ = $\frac{- 6 ÷ 2}{14 ÷ 2}$ =- $\frac{3}{7}$ }$ 

$\text{b) $\frac{33}{- 55}$ = $\frac{33 ÷ ( - 11 )}{( - 55 ) ÷ ( - 11 )}$ = $\frac{- 3}{5}$}$ 

$\text{c) $\frac{15}{35}$ = $\frac{15 ÷ 5}{35 ÷ 5}$ = $\frac{3}{7}$ }$ 

$\text{$\frac{- 48}{- 12}$ = $\frac{( - 48 ) ÷ ( - 12 )}{( - 12 ) ÷ ( - 12 )}$ = $\frac{4}{1}$ = 4}$ 

$\text{d) $\frac{3 . 5 . 11 . 13}{33 . 35 . 37}$ = $\frac{3 . 5 . 11 . 13}{3 . 11 . 5 . 7 . 37}$ = $\frac{13}{259}$}$ 

$\text{e) $\frac{85 - 17 + 34}{51 - 102}$ = $\frac{102}{- 51}$ = $\frac{102 ÷ ( - 51 )}{( - 51 ) ÷ ( - 51 )}$ = $\frac{- 2}{1}$ = - 2}$ 

$#Shi$

$\text{Xin ctlhn cho nhóm ạ}$