"Across" and "down" are not specified as each letter only corresponds to one answer.
No number begins with zero.
A calculator could come in handy!
B + K + Q = 2010
C - S� = 2010
D + 3I = 2010
E� - M = 2010
F - JR = 2010
H - L� = 2010
J� - G = 2010
7N - O = 2010
4R - A = 2010
TV = 2010
U + Y = 2010
X� - W = 2010
Z - 9P = 2010