Giải thích các bước giải:
Bài 1:
$a)$ $\dfrac{18}{30}$ $=$ $\dfrac{18 : 6}{30 : 6}$ $=$ $\dfrac{3}{5}$
$a)$ $\dfrac{6}{24}$ $=$ $\dfrac{6 : 6}{24 : 6}$ $=$ $\dfrac{1}{4}$
Bài 6:
$a)$ $\dfrac{3}{17}$ $+$ $\dfrac{6}{11}$ $+$ $\dfrac{14}{17}$
$=$ $\dfrac{3}{17}$ $+$ $\dfrac{14}{17}$ $+$ $\dfrac{6}{11}$
$=$ $1$ $+$ $\dfrac{6}{11}$
$=$ $\dfrac{17}{11}$
$b)$ $\dfrac{13}{21}$ $+$ $13$ $+$ $\dfrac{29}{21}$
$=$ $\dfrac{13}{21}$ $+$ $\dfrac{29}{21}$ $+$ $13$
$=$ $\dfrac{42}{21}$ $+$ $13$
$=$ $2$ $+$ $13$
$=$ $15$
$\text{#Annihilators}$
