2.5×[17/28÷41/4×(0.92−0.88)]×6.3.

问题描述:

2.5×[

17
28
÷4
1
4
×(0.92−0.88)]×6.3.

2.5×[

17
28
÷4
1
4
×(0.92-0.88)]×6.3
=2.5×[
17
28
÷
17
4
×0.04]×6.3,
=2.5×[
17
28
×
4
17
×0.04]×6.3,
=2.5×
1
7
×0.04×6.3,
=(2.5×0.04)×(
1
7
×6.3),
=1×0.09,
=0.09.