2.1×1.1×0.54÷(5.4×1.21÷5/21)=_.

问题描述:

2.1×1.1×0.54÷(5.4×1.21÷

5
21
)=______.

2.1×1.1×0.54÷(5.4×1.21÷

5
21
),
=2.1×1.1×0.54÷5.4÷1.21×
5
21

=(2.1×
5
21
)×(1.1÷1.21)×(0.54÷5.4),
=0.5×
10
11
×0.1,
=
1
2
×
10
11
×
1
10

=
1
22

故答案为:
1
22