$\frac{1}{8}"+\frac{3}{8}"\ =$  

(a)  

 $\frac{1}{4}"\ +\ \frac{3}{8}"\ =$  

(a)  

 $\frac{3}{16}"\ +\ \frac{3}{16}"\ =$  

(a)  

 $\frac{3}{4}”-\frac{3}{8}”=$  

(a)  

 $\frac{7}{8}”-\frac{5}{8}”=$  

(a)  

 $\frac{15}{16}”-\frac{7}{16}”=$  

(a)  

 $\frac{15}{16}”-\frac{11}{16}”=$  

(a)  

 $\frac{1}{2}”\times\frac{3}{4}”=$  

(a)  

 $\frac{1}{4}”\times\frac{3}{4}”=$  

(a)  

 $\frac{3}{8}”\times\frac{1}{2}”=$  

(a)  

 $\frac{1}{4}”\times\frac{1}{2}”=$  

(a)  

 $\frac{1}{4}”\div\frac{1}{2}”=$  

(a)  

 $\frac{1}{8}”\div\frac{1}{2}”=$  

(a)  

 $\frac{3}{8}”\div\frac{2}{2}”=$  

(a)  

 $\frac{3}{8}”\div\frac{1}{2}”=$  

(a)