1)6,89+5,37=12,2612,26+3,11=15,3715,37+4,63=202)-4,83+3,99= -0,84-0,84+2,83=1,99
1)6,89+5,37=12,26 12,26+3,11=15,37 15,37+4,63=20 2)-4,83+3,99= -0,84 -0,84+2,83=1,99
1)6.89+5.37+3.11+4.63=20 2)20-4.83+3.99+2.83=21.99