S = 50× 25+2× (50+25 )× 2.5 =1250+375 =1625 (square meter)

A: * * * You need to paste 1625 square meters of tiles.

8.y =[8×6+2×(8+6)×3- 1 1.4]×4 =[ 14+84- 1 1.4]×4 = 86.6×4 =

A: It costs 346.4 yuan to draw this teacher.

9.s yellow = 2× 40× (65-10+65+40) = 80×160 =12800 (square centimeter)

S red = 40× (65+65)+3× 40× 40 = 4200+4800 = 9000 (square centimeter).

10, the middle is divided into two cubes, and the total surface area of the two cubes is ≠ the surface area of this cuboid.