1) 7<15 + 2,7<3,2 = 9,7<18,2
2) 3/4>5/8 + 1/4<3 = 3/4>5/8 + 3>1/4 = 3 3/4>7/8
3) 7/12>3/8 + 0,2<1/4 = 7/12>3/8 + 1/4>0,2 = 5/6 > 23/40
4) 2/15 < 3/5 + 2/3 < 14/15 = 4/5 < 1 8/15
Вроде так
1) 7<15 + 2,7<3,2 = 9,7<18,2
2) 3/4>5/8 + 1/4<3 = 3/4>5/8 + 3>1/4 = 3 3/4>7/8
3) 7/12>3/8 + 0,2<1/4 = 7/12>3/8 + 1/4>0,2 = 5/6 > 23/40
4) 2/15 < 3/5 + 2/3 < 14/15 = 4/5 < 1 8/15
Вроде так