口算.
5
9
+
1
9
=
7
8
-
1
16
=
1
8
-
1
9
=
9
10
-
1
10
=
1
4
-
1
8
=
1-
3
11
=
1
6
+
1
7
=
7
8
-
3
8
=
1
6
+
2
6
=
1
4
+
1
8
=
3
11
+
8
11
=
7
8
-
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
9
+
1
9
=
2
3
7
8
-
1
16
=
13
16
1
8
-
1
9
=
1
72
9
10
-
1
10
=
4
5
1
4
-
1
8
=
1
8
1-
3
11
=
8
11
1
6
+
1
7
=
13
42
7
8
-
3
8
=
1
2
1
6
+
2
6
=
1
2
1
4
+
1
8
=
3
8
3
11
+
8
11
=1
7
8
-
1
4
=
5
8
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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