(2 2/15 + 2 7/10) : 1 2/27 - (2 7/10 - 2 2/15) : 2 3/7 По действиям

(2 2/15 + 2 7/10) : 1 2/27 - (2 7/10 - 2 2/15) : 2 3/7 =(32/15 + 27/10) : 29/27 - ( 27/10 - 32/15) : 17/7 =32/15 + 27/10=64/30+81/30= 145/30= 29·5/6·5 = 29/6 27/10 - 32/15=27·3/ 10·3 - 32·2/ 15·2 = 81/30 - 64/30=(81 - 64)/30 = 17/30 29/6 : 29/27 - 17/30: 17/7 =29/6 * 27/29 - 17/30* 7/17 =27/6 - 7/30 = 27·5 /6·5 - 7·1/ 30·1 = 135/30 - 7/30 = 135 - 7 /30 = 128/ 30 = 64·2/ 15·2 = 64/ 15 = 4 + 4·15/ 15 = 4 4/ 15