self Maths Puzzle

(1/1*2)+(1/2*3)+(1/3*4)+(1/4*5)+ .............+(1/99*100)=

Read Solution (Total 1)

self Other Question

1/1=1
2/2=1
3/3=1
y/y=1
z/z=1
But..
0/0=0 not 1
if 13+2=18
25+4=53
67+5=2
then
46+3=?