выполнить умножения а)3 2/5*5;б)7 1/4*4;в)2 1/8*4;г)1 2/9*3;д)2 5/18*6

3 2/5 * 5 = 17/5 * 5 = 17 7 1/4 * 4 = 29/4 * 4 = 29 2 1/8 * 4 = 17/8 * 4 = 17/2 = 8 1/2 1 2/9 * 3 = 11/9 * 3 = 11/3 = 3 2/3 2 5/18 * 6 = 41/18 * 6 = 41/3 = 13 2/3