题目内容

8
2
5
+3
3
10
-8.25
4
3
5
×38.7+4.6+4
3
5
×0.3
〔
3
4
÷3-0.1〕×〔1-
1
3
〕
1.7÷[8
1
3
-(6.6+5
2
5
÷9)]
(1)8
2
5
+3
3
10
-8.25,
=8.4+3.3-8.25,
=8.4-8.25+3.3,
=0.15+3.3,
=3.45;

(2)4
3
5
×38.7+4.6+4
3
5
×0.3,
=4
3
5
×38.7+4
3
5
+4
3
5
×0.3,
=(38.7+1+0.3)×4
3
5
,
=40×
23
5
,
=184;

(3)(
3
4
÷3-0.1)×(1-
1
3
),
=(
3
4
×
1
3
-
1
10
)×
2
3
,
=(
1
4
-
1
10
)×
2
3
,
=
3
20
×
2
3
,
=
1
10
;

(4)1.7÷[8
1
3
-(6.6+5
2
5
÷9)],
=1.7÷[8
1
3
-(6
3
5
+
27
5
×
1
9
)],
=1.7÷[8
1
3
-(6
3
5
+
3
5
)],
=1.7÷[8
1
3
-7
1
5
],
=1.7÷
17
15
,
=1.7×
15
17
;
=1
1
2
.
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