(13,75+9ц1/6)*1,2 / (10,3-8ц1/2)*5/9 = (13ц3/4+9ц1/6)*1,2 / (10,3-8,5)*5/9=
=(165/12+110/12)*1,2 / 18/10*5/9 = 275/12 * 12/10 =27,5
(6,8-3ц3/5)*5ц5/6 / (3ц2/3-3ц1/6)*56 = (68/10-36/10)*35/6 / (22/6-19/6)*56 =
32/10*35/6 / 28 = 32*35 / 60*28 = 8*7 / 12*7 = 2/3
27,5 + 2/3 -27ц1/6 = 27 + 1/2 + 2/3 -27 - 1/6 = 1/2 + 2/3 - 1/6 = (3+4-1)/6 =
1
ответ 1