выполнить действия 4/9×2/7; 8/9×5/16; 10/21×3/29;;4целых2/5×5цел;; 3цел1/2×2цел.2/7;; 4/5×10/3×5/8×12/25

4/9 * 2/7 = 8/63
8/9 * 5/16 = 5/18
10/21 * 3/29 = 10/203
4 2/5 * 5 = 22/5 * 5/1 = 22
3 1/2 * 2 2/7 = 7/2 * 16/7 = 8
4/5 * 10/3 * 5/8 * 12/25 = 8/3 * 5/8 * 12/25 = 5/3 * 12/25 = 4/5