Question 709819
Look at an easier problem:
What is tyhe differeence between 1 and 4 ?
{{{ 4 - 1 = 3 }}} That is the difference, but 
the numbers in between are 2 numbers, 2 and 3
which is 1 less than the difference, so
The difference between 77 and 32 is 
{{{ 77 - 32 = 45 }}}
{{{ 45 - 1 = 44 }}}
There are 44 numbers between 32 and 77