Ксения8 лет назад
1) 2/11 + 1/9 = (2*9 + 1*11)/99 = 29/99 = 0,29 ;
2) 8/13 + 2/3 = (8*3 + 2*13)/39 = 50/39 = 1 11/39 = 1,282 ;
3) 1/3 + 1,25 = 1/3 + 1 1/4 = 1/3 + 5/4 = (1*4 + 5*3)/12 = 19/12 = 1,583 ;
4) 1/6 + 0,33 = 0,166 + 0,33 = 0,496 ;
5) 3/14 * 1,05 = 3/14 * 21/20 = 9/40 = 0,225 ;
6) 7/9 * 1,7 = 7/9 * 17/10 = 119/90 = 1,322.