Hannah has a grid of squares that has 12 rows with 15 squares in each row. she colors 5 rows of 8 squares in the middle of

12 rows of 15 squares = 12 × 15 = 180 squares
5 rows of 8 squares = 5 × 8 = 40 squares
180 squares - 40 squares = 140 squares

Hannah colors 140 squares red.

80 because 12 x 15 = 120, 8 x 5 = 40, and 120 - 40 = 80