2/3

4

\(\dfrac{13}{15}-\dfrac{1}{5}=\dfrac{13}{15}=\dfrac{3}{15}=\dfrac{10}{15}=\dfrac{2}{3}\)

\(\dfrac{7}{8}\times\dfrac{2}{7}=\dfrac{14}{56}=\dfrac{1}{4}\)

2,1(5) = \(\frac{97}{45}\)

2,1(5)=\(2\frac{15-1}{90}\)=\(2\frac{7}{45}\)=\(\frac{97}{45}\)

Phân số tối giản 97/45

0,(5)= \(\frac{5}{9}\)

tích nha!

\(\frac{106}{45}\) nhé

1, (5) = 1 \(\frac{5}{9}\)= \(\frac{14}{9}\)

\(\frac{14}{5}\)

\(1,\left(5\right)=1+0,\left(5\right)=1+0,\left(1\right).5=1+\frac{1}{9}.5=1+\frac{5}{9}=\frac{14}{9}\)

2,3(5)=2,3+0,0(5)=23/10+0,0(1).5=23/10+1/90.5=23/10+1/18=106/45

=>mẫu số là 45

ngu lắm em à

là 106/45

2,3(5) = 2,3 + 0,0(1) x 5 = 2,3 + 5/90 = 106/45