1/3×1/5= 54×1/9= 10/9×3/5= 2/21×3=

1/14×7/9= 1/2-1/5= 1/3+1/5= 4/5-1/2=

5/63×0= 3/4×5/6= 2/5×5/8= 2/3+1/4=

3/60×1= 1/2×1/4= 7/16×4= 20×3/4=

1/4+1/5= 3/5×5/6= 2/9×3/5= 1/5×3=