Question

Bob is tiling the floor of his 12 foot by 16 foot living room. He plans to place one-foot by one-foot square tiles to form a border along the edges of the room and to fill in the rest of the floor with two-foot by two-foot square tiles. How many tiles will he use?

Answer 1

(12×2)+(14×2)=52___the area around the border

1×1=1_____the area of tiles around the border

52÷1=52_______number of tiles

(12-2)×(16-2)=140

2×2=4

140÷4=35

52+35=87