> 数学 >
19
5
9
+3
9
10
−5.22
19
5
9
−6
27
50
+5.22
÷(
1993×0.4
1995×0.5
+
1.6
1995
)
人气:363 ℃ 时间:2019-10-19 04:22:43
解答
19
5
9
+3
9
10
−5.22
19
5
9
−6
27
50
+5.22
÷(
1993×0.4
1995×0.5
+
1.6
1995
)

=
19
5
9
−1.32
19
5
9
−1.32
÷
1993×0.4+0.8
1995×0.5

=1÷
0.4×(1993+2)
1995×0.5

=1÷
4
5

=
5
4
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