题目内容

1
7
×102.31+40
6
7
×102.31
8
15
×[
5
6
÷(
7
9
-
1
3
)]
8
3
+(
1
3
-
4
5
5
6
×10.68+8.52×
5
6
)÷1
3
5
(1)
1
7
×102.31+40
6
7
×102.31,
=(
1
7
+40
6
7
)×102.31,
=41×102.31,
=4194.71;

(2)
8
15
×[
5
6
÷(
7
9
-
1
3
)],
=
8
15
×[
5
6
÷
4
9
],
=
8
15
×
15
8

=1;

(3)
8
3
+(
1
3
-
4
5
),
=
8
3
+
1
3
-
4
5

=3-
4
5

=2
1
5


(4)(
5
6
×10.68+8.52×
5
6
)÷1
3
5

=[
5
6
×(10.68+8.52)]÷1
3
5

=[
5
6
×19.2]×
5
8

=16×
5
8

=10.
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