(9,21+ 7 целых 3/20)×(10-6 целых 1/2 : 7
3/20 = 15/100 = 0,15 1/2 = 5/10 = 0,5 ---------------------------------------------------------------- = (9,21 + 7,15) * (10 - 6,5) : 7 = 8,18 1) 9,21 + 7,15 = 16,36 2) 10 - 6,5 = 3,5 3) 16,36 * 3,5 = 57,26 4) 57,26 : 7 = 8,18