题目内容

6
3
4
×
2
5
+
3
5
×6
3
4
+6.75×3
②(
5
18
÷
1
3
+
5
18
)×0.25
13
1
3
×1
1
5
×[3
5
6
+(12.4-12
8
45
)].
(1)6
3
4
×
2
5
+
3
5
×6
3
4
+6.75×3,
=6
3
4
×(
2
5
+
3
5
+3),
=6
3
4
×(1+3),
=6
3
4
×4,
=27;

(2)(
5
18
÷
1
3
+
5
18
)×0.25,
=(
5
6
+
5
18
)×0.25,
=
10
9
×0.25,
=
5
18


(3)13
1
3
×1
1
5
×[3
5
6
+(12.4-12
8
45
)],
=13
1
3
×1
1
5
×[3
5
6
+
2
9
],
=13
1
3
×1
1
5
×
73
18

=
40
3
×
6
5
×
73
18

=
584
9
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