Using [generalized factorial(or multifactorial or k-torial)](https://en.wikipedia.org/wiki/Double_factorial#Generalizations) we obtain:

1:

>! 100=11!!!!!!+11!!!!!!!+1

2:
>! 100=22!!!!!!!!!!!!!!!!!!+(2+2)!/2

3:
>! 100=((3!)!!)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!+3!-(3!+3!)/(3!)

4:
>! 100=(4!)!!!!!!!!!!!!!!!!!!!!+4+(4-4)/4

5:
>! 100=(5!!)!!!!!!!!!+5+5+5-5

6:
>! 100=(6!!)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!+6-(6+6)6

7:
>! 100=(7!!!)!!!!!!!!!!!!!!!!!!!!!!!!!+7!!!!!+(7+7)/7

8:
>! 100=(8!!!!+8!!!!!!+(8+8)/8)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!