$\frac{1}{10}\cdot\frac{10}{1}=$  

(a)  

 $\frac{3}{8}\cdot8=$  

(a)  

 $\frac{1}{5}+\frac{3}{5}=$  

(a)  

 $\frac{6}{10}+\frac{4}{10}=$  

(a)  

 $\frac{3}{8}+\frac{4}{8}=$  

(a)  

 $\frac{1}{2}:\frac{1}{2}=$  

(a)  

 $\frac{4}{9}\cdot\frac{1}{9}=$  

(a)  

 $\frac{1}{5}-\frac{1}{6}=$  

(a)  

 $1-\frac{1}{9}=$  

(a)  

 $2-1\frac{1}{7}=$  

(a)  

 $5-\frac{4}{9}=$  

(a)  

 $\frac{3}{4}\cdot\frac{4}{3}\cdot\frac{1}{3}=$  

(a)  

 $2\frac{1}{3}+3\frac{2}{3}=$  

(a)  

 $3\frac{1}{5}+4\frac{4}{5}=$  

(a)  

 $8\frac{1}{2}-4\frac{1}{2}=$  

(a)  

 $9\frac{1}{2}+4\frac{1}{2}=$  

(a)  

 $\frac{3}{8}+\frac{1}{4}+\frac{1}{8}=$  

(a)  

 $\frac{1}{2}\cdot\left(1+2+2+1\right)=$  

(a)  

 $\frac{3}{2}\cdot\left(\frac{1}{2}+\frac{1}{2}\right)=$  

(a)