\(\frac{18181818}{81818181}+\frac{7}{9}=\frac{18\cdot\left(101010\right)}{81\cdot\left(101010\right)}+\frac{7}{9}=\frac{18}{81}+\frac{7}{9}=\frac{2}{9}+\frac{7}{9}=1\)
HOK TỐT~
= \(\frac{2}{9}+\frac{7}{9}\)
= 1
# Hok tốt !
toán lớp 4 v... c.... c....