Задание 1.
㏒5 (72)=㏒5 (2³*3²)=㏒5 (2³)+㏒5 (3²)=3㏒5 (2)+2㏒5 (3)=3а+2в.
Задание 2.
㏒5 (30)=㏒5 (2*3*5)=㏒5 (2)+㏒5 (3)+㏒5 (5)=а+в+1.
706х59=41654
133760:209=640
41654-640=41014
68 * 4/17 = 16
36/35 * 6/7 = 216/245
72 * 0,9 = 64,8
20 * 0,14 =2,8
16 * 30 / 100 = 5,4
15/13 * 65 / 100 = 975/1300.