В)
15 2/5 * 1 5/7 + 6 10/27 * 3 3/8 =
77/5 * 12/7 + 172/27 * 27/8 =
132/5 + 172/8 =
132/5 + 43/2 =
264/10 + 215/10 =
479/10 = 47 9/10.
г)
15 4/7 - 4 3/8 * (1 3/7 - 34/35) =
15 4/7 - 35/8 * (10/7 - 34/35) =
15 4/7 - 35/8 * (50/7 - 34/35) =
15 4/7 - 35/8 * 16/35 =
15 4/7 - 2 = 13 4/7