1) 16 × (5/16 - 3/8 + 1/4) = 16 × (5/16 - 6/16 + 4/16) = 16 × 3/16 = 48/16 = 3.

2) (5,25 - 1/4) ÷ 0,2 = (5,25 - 0,25) ÷ 0,2 = 5 ÷ 0,2 = 25.