11

15

0

10

11

15

14

0

12

16

18

20

14

17

18

19

14

16

18

11

15

16

12

19

21

22

23

10

9

27

22

27

122

24

25

26

21

22

23

$\frac{12}{34}$

$\frac{80}{85}$

$\frac{22}{68}$

$\frac{6}{16}\ \frac{1}{2}\ \frac{3}{4}\ \frac{7}{8}$

$\frac{4}{6}\ \frac{5}{9}\ \frac{1}{3}\ \frac{2}{18}$

$\frac{2}{7}\ \frac{11}{21}\ \frac{25}{42}\ \frac{2}{3}$

 $\frac{10}{13}$  

 $\frac{22}{30}$  

 $\frac{12}{17}$  

 $\frac{13}{18}$  

$\frac{7}{9}$

$\frac{11}{26}$

$\frac{8}{16}$

$\frac{13}{14}$

 $\frac{5}{8}$  

 $\frac{13}{16}$  

 $\frac{6}{8}$  

 $\frac{8}{12}$  

$\frac{1}{7}\ \frac{2}{14}\ \frac{3}{20}\ \frac{4}{25}$

$\frac{1}{3}\ \frac{2}{6}\ \frac{5}{9}\ \frac{4}{12}$

$\frac{1}{4}\ \frac{2}{8}\ \frac{3}{12}\ \frac{4}{15}$

$\frac{1}{5}\ \frac{2}{10}\ \frac{3}{15}\ \frac{4}{18}$

$\frac{12}{11}\ \frac{9}{7}\ \frac{5}{8}$

$\frac{5}{7}\ \frac{9}{8}\ \frac{5}{8}$

$\frac{6}{5}\ \frac{7}{3}\ \frac{15}{11}$

$\frac{12}{13}\ \frac{9}{10}\ \frac{11}{10}$

$\frac{1}{2}\ \frac{2}{3}\ \frac{3}{5}$

$\frac{5}{4}\ \frac{3}{2}\ \frac{6}{5}$

$\frac{3}{5}\ \frac{1}{2}\ \frac{7}{6}$

$\frac{5}{9}\ \frac{7}{8}\ \frac{4}{3}$

นำเศษมาบวกกัน

ทำเศษให้เท่ากัน

ทำส่วนให้เท่ากัน

ทำเศษและส่วนให้เท่ากัน

38

39

40