5 17/20 + (3 1/2 - 2 3/8) × 1 1/3 ×(4 1/3 - 1 5/6) = 5 34/40 + (3 20/40 - 2 18/40) × 1 1/3 × (4 2/6 - 1 5/6) = (5 34/40 + 1 2/40) × (1 1/3 ×2 3/6) = 4 32/40 × (4/3 ×15/6) = 4 32/40 × 60/18 = 4 32/40 × 10/3= 4 4/5 × 10/3 = 24/5 × 10/3 = 8/1 × 2/1 = 16