7 = (7·8)/8 = 56/8 7 и 5/8 = 56/8 и 5/8
9 = (9·4)/4 = 36/4 9 и 1/4 = 36/4 и 1/4
4 = (4·7)/7 = 28/7 3/7 и 4 = 3/7 и 28/7
8 = (8·10)/10 = 80/10 9/10 и 8 = 9/10 и 80/10
15 = (15·10)/10 = 150/10 15 и 3/10 = 150/10 и 3/10
20 = (20·8)/8 = 160/8 20 и 3/8 = 160/8 и 3/8
9 = (9·12)/12 = 108/12 9 и 5/12 = 108/12 и 5/12
3 = (3·11)/11 = 33/11 7/11 и 3 = 7/11 и 33/11
1)18:2=9 - это на 1 шалаш
2)27:9=3
Ответ: 3 шалаша
7/220+17/330=55/660=1/12
0,88-2/15=88/100 - 2/15= 22/25 - 2/15= 56/75
(1/6+5/18)-(1/18+1/24)=8/18 -7/72=25/72