题目内容

脱式计算:
4
5
+
1
4
)÷
7
3
+
7
10
(0.75-
3
10
)×(
2
9
+
1
3
5
14
÷
4
21
×0.64
2-
6
13
÷
9
26
-
2
3
(1)(
4
5
+
1
4
)÷
7
3
+
7
10

=
21
20
×
3
7
+
7
10

=
9
20
+
7
10

=
23
20


(2)(0.75-
3
10
)×(
2
9
+
1
3
),
=(0.75-0.3)×
5
9

=0.45×
5
9

=0.25;

(3)
5
14
÷
4
21
×0.64,
=
5
14
×
21
4
×0.64,
=1.2;

(4)2-
6
13
÷
9
26
-
2
3

=2-
6
13
×
26
9
-
2
3

=2-
4
3
-
2
3

=0.
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