4.5,2.3,2.3, 2.5,2.7,3.5,4.5,7.9
1) -26+17-32+20=-58+37=-21
2) 1.8-3.6-2.6+5.2=7-6.2=0. 8
3) -0.6-(-0.8)+(-1.7)+6.1=-0.6+0.8-1.7+6.1=4. 6
от 9999993 до 10000006............