Question

1/3X1/4十1/4X1/5十1/5X1/6十1/6……1/47X1/48等于多少?

Answer 1

1/3X1/4十1/4X1/5十1/5X1/6十1/6……1/47X1/48
=1/3-1/4+1/4-1/5+...+1/47-1/48
=1/3-1/48
=16/48-1/48
=15/48
=5/16;