(7целых 1/2*2целых 2/3-12 целых1/4:7/9):6+3 целых 1/8+5целых 2/7
1 3 2 4 5 6 (7 1/2 * 2 2/3 - 12 1/4 : 7/9) : 6+3 1/8 + 5 2/7 = 9 5/42 7 1/2 * 2 2/3= 15/2 * 8/3 =20 12 1/4: 7/9= 49/7:7/9=15 3/4 20-15 3/4= 4 1/4 4 1/4:6= 17/24 17/24+3 1/8=3 5/6 3 5/6 + 5 2/7 = (3+5)+5/6+2/7=9 5/42