Write down the value of the underlined digit



3 8 5 8
   -
Value of the underlined digit ___________

7 7 6 3
-
Value of the underlined digit ___________
5 9 4 4
        -
Value of the underlined digit ___________

4 9 7 9
      -
Value of the underlined digit ___________

3 8 4 2
        -
Value of the underlined digit ___________

1 9 9 9
   -
Value of the underlined digit ___________

9 6 7 7
-
Value of the underlined digit ___________