This is similar to The Irrational Units Digit, so I will adapt

its solution for this problem.

sqrt(2)+sqrt(5) and its conjugate sqrt(5)-sqrt(2) are roots of x^4 - 14x^2 + 9 = 0. Then the sum of the powers of sqrt(2)+sqrt(5) and sqrt(5)-sqrt(2) obey the recursion s(2n+4) = 14*s(2n+2) - 9*s(2n).

Direct calculation finds s(2) = 7 and s(4) = 89. The sequence continues 7, 89, 1183, 15761, 210007, ... The last digit repeats in a cycle of 4: 7, 9, 3, 1, 7, 9, 3, 1, ... Then the last digit of s(2000), which is the last digit of [sqrt(2)+sqrt(5)]^2000 + [sqrt(5)-sqrt(2)]^2000, is 1.

sqrt(5)-sqrt(2) is between 0 and 1, then [sqrt(5)-sqrt(2)]^2000 is also between 0 and 1. Therefore the digits on either side of the decimal point are **0.9**.