1)4/9-1/3 2)4/9×1/2 3)5 целых 3/4:23/40плиз

1) 4/9 - 1/3 = 4/9 - 3/9 = 1/92) 4/9 * 1/2 = (2*1)/(9*1) = 2/93) 5 целых 3/4 : 23/40 = 23/4 * 40/23 = (1*10)/(1*1) = 10