直接寫得數(shù)
4
5
-
1
2
=
1
2
+
3
4
=
7
10
×
5
7
=
2-
3
5
=
3
22
×11=
3
14
×
7
8
=
2
13
=
2
3
÷
2
3
=
5
8
÷
1
8
=
4
7
=
4
9
×
3
8
=
7
12
×
3
14
=
分析:本題根據(jù)分?jǐn)?shù)的加法、減法、乘法、除法的運(yùn)算法則計(jì)算即可.
解答:
解:
4
5
-
1
2
=
3
10
1
2
+
3
4
=
5
4
,
7
10
×
5
7
=
1
2
2-
3
5
=1
2
5
,
3
22
×11=
3
2
,
3
14
×
7
8
=
3
16
,
2
13
=0,
2
3
÷
2
3
=1,
5
8
÷
1
8
=5,
4
7
=7,
4
9
×
3
8
=
1
6
,
7
12
×
3
14
=
1
8
故答案為:
3
10
5
4
,
1
2
,1
2
5
,
3
2
,
3
16
,0,1,5,7,
1
6
1
8
點(diǎn)評:完成有關(guān)于分?jǐn)?shù)的計(jì)算關(guān)鍵要注意通分約分.
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