Yixin Garden, Wei Zi Road, Nada Town

(1) gate (2 1), supermarket (5, 2), swimming pool (8, 6) and back door (9, 8);

(2) According to the characteristics of the number pairs and positions, find the positions of the 3 and 4 buildings as shown in the figure;

(3) 100×4=400 (m),

100×7=700 (m),

So Xiao Qiang walked from 1 building to the back door, first walking 400 meters north, and then walking 700 meters east.

(4) As can be seen from the picture, Xiaogang walked four squares to the east from Building 2, and then two squares to the south, and he arrived at the garden.

So the answer is: 2 1, 5, 2, 8, 6, 9, 8; 400 in the north and 700 in the east.