Write down the value of the underlined digit



3 8 6 8
   -
Value of the underlined digit ___________

6 6 2 2
-
Value of the underlined digit ___________
2 8 6 3
        -
Value of the underlined digit ___________

4 8 5 9
      -
Value of the underlined digit ___________

4 9 4 2
        -
Value of the underlined digit ___________

5 9 5 9
   -
Value of the underlined digit ___________

9 7 2 2
-
Value of the underlined digit ___________