口算
11
12
-
5
6
=
9
10
×20
=
12
5
÷2
=
9
14
+
2
7
=
3
5
÷
1
12
=
5
18
×36=
6
7
÷3=
5
4
=
分析:根據(jù)分?jǐn)?shù)加減乘除的計(jì)算方法進(jìn)行計(jì)算即可.
解答:解:
11
12
-
5
6
=
1
12
9
10
×20
=18,
12
5
÷2
=
6
5
9
14
+
2
7
=
13
14
,
3
5
÷
1
12
=
36
5
,
5
18
×36=10,
6
7
÷3=
2
7
,
5
4
=
24
5
點(diǎn)評(píng):口算時(shí),注意運(yùn)算符號(hào)和數(shù)據(jù),然后再進(jìn)一步計(jì)算即可.
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