Ymarfer adio a thynnu ffracsiynau

 $\frac{6}{8}+\ \frac{4}{8}=$  

(a)  

 $\frac{7}{11}+\frac{2}{11}=$  

(a)  

 $\frac{12}{9}-\frac{5}{9}=$  

(a)  

 $\frac{9}{15}\ -\ \frac{4}{15}=$  

(a)  

 $\frac{11}{17}+\ \frac{2}{17}=$  

(a)  

 $\frac{16}{13}-\ \frac{4}{13}=$  

(a)  

 $\frac{13}{11}-\frac{4}{11}=$  

(a)  

 $\frac{6}{9}+\ \frac{4}{9}=$  

(a)  

 $\frac{17}{19}-\ \frac{6}{19}=$  

(a)  

 $\frac{12}{15}+\ \frac{8}{15}=$  

(a)