Write down the value of the underlined digit

4  3
--
Value of the underlined digit ___________
2  2
    --
Value of the underlined digit ___________

6  4
    --
Value of the underlined digit ___________

9  4
--
Value of the underlined digit ___________

1  3
--

Value of the underlined digit ___________

4  5
    --
Value of the underlined digit ___________

6  4
--

Value of the underlined digit ___________

8  7
--

Value of the underlined digit ___________