4 3/8-(3 5/7- 5/7)+1 5/3
1) 3 5/7 - 5/7 = 26/7 - 5/7 = (26 - 5)/7 = 21/7 = 3 2) 3/8 - 3 = 35/8 - 3/1=(35 × 1 - 3 × 8)/8 = 35/8 - 24/8 = 11/8 = 1 3/8 3) 1 3/8 + 1 5/3 = 11/8 + 8/3 =(11 × 3 + 8 × 8)/24 = 33/24 + 64/24 = 97/24 = 4 1/24 ответ 4 1/24