03). a). 2 1/7 *(1 2/3 + 2 7/9 * 3,6) = 15/7 *(5/3 + 25/9 * 36/10) =
= 15/7 *(5/3 + 10) = 15/7 * 35/3 = 25
б). (6 7/12 - 3 17/36)*2,5 - 4 1/3 : 0,65 =
= (6 21/36 - 3 17/36)*2,5 - 13/3 * 100/65 =
= 28/9 * 25/10 - 20/3 = 70/9 - 60/9 = 10/9 = 1 1/9
04). a). 7/9 * 1 2/7 - 3,72 + 8 = 7/9 * 9/7 + 4,28 = 1 + 4,28 = 5,28
б). (0,25 + 1 1/2) : 55/7 * 11/7 = (0,25 + 1,5) : 55/7 * 11/7 =
= 7/4 : 55/7 * 11/7 = 49/220 * 11/7 = 7/20 = 0,35
05) a). 1 2/3 : 5 + 0,175 * 20/7 = 5/3 * 1/5 + 7/40 * 20/7 = 1/3 + 1/2 = 5/6
б). 2/3 - 36:(11,8 + 1/5) = 2/3 - 36 : 12 = 2/3 - 3 = -2 1/3