2 3/5 = 13/5

5 4/9= 49/9

9 3/8 =75/8

12 7/10= 127/10

Đúng ko

K mk nha

=13/5

=49/9

=76/8

=127/20

..xoxo..

\(2\frac{3}{5}=\frac{13}{5}\)

\(5\frac{4}{9}=\frac{49}{9}\)

\(9\frac{3}{8}=\frac{75}{8}\)

\(12\frac{7}{10}=\frac{127}{10}\)

 \(12\frac{3}{5}=\frac{63}{5}=12,6\)

12.6 kết bạn với mình nhé .

\(12\frac{3}{5}=\frac{63}{5}=12,6\)

a) \(3\frac{2}{7}=\frac{3.7+2}{7}=\frac{23}{7}\)                                                                        b)  \(2\frac{5}{12}=\frac{2.12+5}{12}=\frac{29}{12}\)

c)  \(9\frac{5}{9}=\frac{9.9+5}{9}=\frac{86}{9}\)                                                                   d) \(12\frac{3}{4}=\frac{12.4+3}{4}=\frac{51}{4}\)

a . \(3\frac{2}{7}=\frac{3\cdot7+2}{7}=\frac{23}{7}\)

b . \(2\frac{5}{12}=\frac{2\cdot12+5}{12}\frac{29}{12}\)

c . \(9\frac{5}{9}=\frac{9\cdot9+5}{9}=\frac{86}{9}\)

d . \(12\frac{3}{4}=\frac{12\cdot4+3}{4}=\frac{51}{4}\)

a,   \(3\frac{2}{7}=\frac{3X7+2}{7}=\frac{23}{7}\)

b,   \(2\frac{5}{12}=\frac{2X12+5}{12}=\frac{29}{12}\)

c,    \(9\frac{5}{9}=\frac{9X9+5}{9}=\frac{86}{9}\)

d,     \(12\frac{3}{4}=\frac{12X4+3}{4}=\frac{51}{4}\)

             Chúc bạn học giỏi !

a/\(2\frac{1}{3}=\frac{2.3+1}{3}=\frac{7}{3}\)

\(4\frac{2}{5}=\frac{4.5+2}{5}=\frac{22}{5}\)

\(3\frac{1}{4}=\frac{3.4+1}{4}=\frac{13}{4}\)

\(9\frac{5}{7}=\frac{9.7+5}{7}=\frac{68}{7}\)

\(11\frac{3}{10}=\frac{11.10+3}{10}=\frac{113}{10}\)

b/\(5\frac{2}{17}=\frac{5.17+2}{17}=\frac{87}{17}\)

\(3\frac{6}{23}=\frac{3.23+6}{23}=\frac{75}{23}\)

\(7\frac{4}{9}=\frac{7.9+4}{9}=\frac{67}{9}\)

\(121\frac{15}{100}=\frac{121.100+15}{100}=\frac{12115}{100}\)

\(8\frac{3}{7}=\frac{8.7+3}{7}=\frac{59}{7}\)

\(3\frac{2}{5}=3+\frac{2}{5}=3+0,4=3,4\)

\(\frac{2}{5}=0,4\)

\(\Rightarrow3\frac{2}{5}=3,4\)

\(2\dfrac{3}{4}=\dfrac{2\times4+3}{4}=\dfrac{11}{4}\\ 3\dfrac{4}{5}=\dfrac{3\times5+4}{5}=\dfrac{19}{5}\\ 4\dfrac{3}{5}=\dfrac{4\times5+3}{5}=\dfrac{23}{5}\\ 11\dfrac{12}{13}=\dfrac{11\times13+12}{13}=\dfrac{155}{13}\\ 12\dfrac{11}{13}=\dfrac{12\times13+11}{13}=\dfrac{167}{13}\\ 3\dfrac{3}{5}=\dfrac{3\times5+3}{5}=\dfrac{18}{5}\)

2\(\dfrac{3}{4}\)=\(\dfrac{11}{4}\)

3\(\dfrac{4}{5}\)=\(\dfrac{19}{5}\)

4\(\dfrac{3}{5}\)=\(\dfrac{23}{5}\)

11\(\dfrac{12}{13}\)=\(\dfrac{155}{13}\)

12\(\dfrac{11}{13}\)=\(\dfrac{167}{13}\)

3\(\dfrac{3}{5}\)=\(\dfrac{18}{5}\).

\(\frac{37}{6}=6\frac{1}{6}\)

\(\frac{12}{5}=2\frac{2}{5}\)

\(\frac{108}{9}=\frac{12}{1}\)

\(\frac{37}{6}=6\frac{1}{6}\);

\(\frac{12}{5}=2\frac{2}{5}\) ;

\(\frac{108}{9}=12\)

bài cuối ko phải là số thập phân nữa

ủng hộ nha

37/6 = 6/1/6

12/5=2/2/5

108/9=12

a)

\(3\frac{2}{5}=3,4\)

\(12\frac{3}{4}=12,75\)

\(6\frac{1}{2}=6,5\)

b)

\(1,245=\frac{249}{200}\)

\(45,2=\frac{226}{5}\)

\(20,15=\frac{403}{20}\)

trẻ trâu vl

a 3 2/5=1,7

12 3/4=5,1

6 1/2=1,3

b 1,245=1 245/1000

45,2=45 2/10

20,15=20 15/100

Bài 1:
a) \(2\)\(\dfrac{2}{3}\)\(=\dfrac{8}{3}\)
b) \(1\)\(\dfrac{5}{7}=\dfrac{12}{7}\)