口算.
5
6
-
1
6
=
1
8
+
5
8
=
3
10
-
1
10
=
7
8
-
1
16
=
5
8
-
1
8
=
1-
7
8
=
1
6
+
1
12
=
3
8
-
3
8
=
7
8
-
3
8
=
10
9
+
8
9
=
4
11
-
4
11
=
1
6
+
1
4
=
分析:根據(jù)分?jǐn)?shù)加減法的計(jì)算方法進(jìn)行計(jì)算.
解答:解:
5
6
-
1
6
=
2
3
1
8
+
5
8
=
3
4
3
10
-
1
10
=
1
5
7
8
-
1
16
=
13
16
5
8
-
1
8
=
1
2
1-
7
8
=
1
8
1
6
+
1
12
=
1
4
3
8
-
3
8
=0
7
8
-
3
8
=
1
2
10
9
+
8
9
=2
4
11
-
4
11
=0
1
6
+
1
4
=
5
12
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.
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