你的理由是:
A.35.7+219.1
B.400-199.9
C.29.5×9
D.34.8÷0.1
2.76÷0.23=
0.276÷0.023=
27.6÷0.23=
27.6÷230=
4.83÷0.07=÷7
1.96÷0.8=÷8
16.3÷9.63=÷ 54.38÷6.4=÷