题目内容

计算要写出必要的计算过程
8
2
3
÷3
5
7
-6.09÷4.06
7-1÷7-1
1
5
×4
(1
2
3
×2
2
5
+4
1
2
)÷2
2
3

1-(5
5
7
-3.5)÷31(保留两位小数)
8
2
3
÷3
5
7
-6.09÷4.06
=
26
3
×
7
26
-
3
2

=
7
3
-
3
2

=
5
6


7-1÷7-1
1
5
×4
=7-
1
7
-
6
5
×
4,
=6
6
7
-4
4
5

=(6-4)+(
6
7
-
4
5
),
=2+
2
35

=2
2
35


(1
2
3
×2
2
5
+4
1
2
)÷2
2
3

=(
5
3
×
12
5
+4
1
2
÷2
2
3

=(4+4
1
2
)×
3
8

=
17
2
×
3
8

=3
3
16


1-(5
5
7
-3.5)÷31
=1-(
40
7
-
7
2
)×
1
31

=1-
31
14
×
1
31

=1-
1
14

=
13
14

≈0.93.
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