Question

Write down the digits 1 to 9 in descending order. Insert + and - signs to form a sum which total 100.

Answer 1

Answer:

=9,8,7,6,5,4,3,2,1,

=

9+8+7+6+5+4+3+2+1+0-9-8-7-6-5-4-3-2-1

=41+0-41

=41-41=0