5 2/9 : (3-1 1/9 * 2 2/5) + 4/5
5 2/9 : (3 - 1 1/9 * 2 2/5) + 4/5 = 16 7/15 1) 1 1/9 * 2 2/5 = 10/9 * 12/5 = 8/3 = 2 2/3 2) 3 - 2 2/3 = 1/3 3) 5 2/9 : 1/3 = 47/9 * 3/1 = 47/3 = 15 2/3 4) 15 2/3 + 4/5 = 15 10/15 + 12/15 = 15 22/15 = 16 7/15
1) 10/9×12/5=8/3 2) 3-8/3=1/3 3) 47/9÷1/3=47/3 4) 47/3+4/5=247/15 ===16 7/15