27 + 23 = 50,
39 + 17 = 56,
38 + 19 = 57,
29 + 37 = 66
(13,3: 0,38-32,54):(3,2*0,65+1,32) ; 1)13,3:0,38=35; 2)35-32,54=2,46;
3)3,2*0,65=2,08; 4)2,08+1,32=3,4;
5)2,46:3,4=246/100*10/34=246/340=123/170
26*39=1014
81*47=3807
1014+3807=4821(см)
45+7=52 32-9=23 вот и все
1) 29 49/53 - 8 49/53 = 21, 2)1. 20 16/25 + 13 9/25 = 33 25/25 = 34 2. 23 4/14 + 7 13/14 = 30 17/14 = 31 3/14 3. 34 - 31 3/14 = 33 14/14 - 31 3/14 = 2 11/14