(112)0-(1-0.5-2)÷(278)23的值为(  ) A.-13 B.13 C.43 D.73

问题描述:

1

1
2
0-(1-0.5-2)÷(
27
8
)
2
3
的值为(  )
A. -
1
3

B.
1
3

C.
4
3

D.
7
3

原式=1-(1-

1
0.52
)÷(
3
2
)
2
3

=1-(1-
1
0.25
)÷(
3
2
)
2

=1-(1-4)×
4
9

=1-(-3)×
4
9

=1+
4
3

=
7
3

故选:D.