问题
选择题
0.00067×0.338-(75×0.00000102÷0.00338×0.042)=( )
A.0.00008
B.0.0008
C.0.000529
D.0.0529
答案
原式=0.0002265-(0.000075÷0.00338×0.042)
=0.0002265-(0.0221893×0.042)
=0.0002265-0.000932
≈0.0008,
故选B.
0.00067×0.338-(75×0.00000102÷0.00338×0.042)=( )
A.0.00008
B.0.0008
C.0.000529
D.0.0529
原式=0.0002265-(0.000075÷0.00338×0.042)
=0.0002265-(0.0221893×0.042)
=0.0002265-0.000932
≈0.0008,
故选B.