1.2008/2= 1004 Even numbers are directly divided by two, and odd numbers are divided by one. There is a formula.

2.a, B, C, D, and E are arranged clockwise to represent one to five primary schools, and X 1, X2, X3, X4, X5 computers are assigned to adjacent schools in turn, according to the meaning of the question 7+X 1-X2 = 1+X2-X3 =

X2 = X 1-3, X3 = X 1-2, X4 = X 1-9, X5 = X 1-5. This question requires y = | x1|||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||

From the geometric meaning of the absolute value, we can know that when X 1=3, y has the minimum value of 12, at this time, X2=0, X3= 1, X4=-6, X5=-2, that is, three computers change from small to small, six computers change from small to small, and two computers change from small to small.

3. Analysis and discussion.

When a & gt0.b <: 0, C<0, the original formula =1-1-1+1-1=-3.

When A & gt0.B& gt；; 0.C<0, the original formula =1+1-1+1-1-1.

When A & gt0.B& gt；; 0.C>0. Original formula =1+1+1+1+1= 7.

When a & lt0.b <: 0.C<0, the original formula =-1-1+1+0-1=-1.

When A & lt0.B& gt；; 0.C<0, the original formula =-1+1-1-1=-3.

When A & lt0.B& gt；; 0.C>0, the original formula =-1+1+0+1-1=-1.