A = 34.8 - 16.3 - 9.8 + 11.2
A = 18.5 - 9.8 + 11.2
A = 8.7 + 11.2
A = 19.9
B = 35.2 - 8 * 2.6 + 7.9
B = 35.2 - 20.8 + 7.9
B = 22.3
C = 6.7 - (13.2-5) : 2+ 1.4
C = 6.7 - 8.2 : 2 + 1.4
C = 6.7 - 4.1+ 1.4
C = 4
D = 20.6 - (5.8 + 12.4) - 0.7 * 3
D = 20.6 - 18.2 - 0.7*3
D = 20.6 - 18.2 - 2.1
D = 0.3