Write down the value of the underlined digit

8  4  3
-
Value of the underlined digit ___________
4  9  9
    -
Value of the underlined digit ___________

1  8  4
        -
Value of the underlined digit ___________

9  6  5
    -
Value of the underlined digit ___________

3  6  4
-
Value of the underlined digit ___________
5  1  3
        -
Value of the underlined digit ___________

6  9  7
    -
Value of the underlined digit ___________

1  2  5
        -
Value of the underlined digit ___________