A.1 B.10 C.100 D.1000
A.1.06 B.1.16 C.1.26 D.1.36
A.8 B.12 C.20 D.25.4
A.2.778×10-1 B.2.778×10-2 C.2.778×10-3 D.2.778×10-4
