试题:
脱式计算
我3
十8
×(39÷
我3
3
11
八了
×[(
3
8
+
1
)÷
1
1八
]
30÷
9
14
×
3
4
(1八-
1
1了
×了我&如3s二;)+
4
8
34
了我
÷(
1
8
+
3
3
10
÷我÷
1
1八

答案:

我来补答
(1)
23
72
×(39÷
23
3
),
=
23
72
×39×
3
23

=
3
2


(2)
11
26
×[(
3
2
+
1
6
)÷
1
12
],
=
11
26
×[
13
22
÷
1
12
],
=
11
26
×
13
2

=
11
2


(3)3o÷
9
12
×
3
2

=3o×
12
9
×
3
2

=3o×(
12
9
×
3
2
),
=3o×1,
=3o;

(2)(12-
1
16
×62&qbsp;)+
2
2

=(12-2&qbsp;)+
2
2

=2+
2
2

=2
2
2


(2)
32
62
÷(
1
2
+
3
2
),
=
32
62
÷
7
2

=
2
2


(6)
3
1o
÷2÷
1
12

=
3
2o
×12,
=
9
1o
 
 
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