题目内容

脱式计算(带●的要简算)
13.25-18÷4.5+7.6 1÷[(
1
4
-10%)÷
3
2
]
5
7
÷9+
4
7
×
1
9
6
5
×(
2
9
×
6
5
+
5
6
(1)13.25-18÷4.5+7.6,
=13.25-4+7.6,
=9.25+7.6,
=16.85;

(2)1÷[(
1
4
-10%)÷
3
2
],
=1÷[(
1
4
-
1
5
)÷
3
2
],
=1÷[
1
20
×
2
3
],
=1÷
1
30

=1×30,
=30;

(3)
5
7
÷9+
4
7
×
1
9

=
5
7
×
1
9
+
4
7
×
1
9

=(
5
7
+
4
7
)×
1
9

=
9
7
×
1
9

=
1
7


(4)
6
5
×(
2
9
×
6
5
+
5
6
),
=
6
5
×
2
9
×
6
5
+
5
6
×
6
5

=
8
25
+1,
=1
8
25
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