题目内容

直接写得数:
5
4
=
4+
4
3
=
4
9
÷2=
9
25
×
2
3
=
1
6
÷1.2=
0.32+
2
25
=
4
5
-0.2=
0.8+0.39=
3
4
×12=
3
8
+0.8=
2÷
5
6
=
3
28
×34=
1
4
+
1
6
=
3
5
×
2
3
=
4
7
×
3
4
=
1
2
÷
2
5
=
分析:根据分数、小数四则运算的运算法则直接求解即可.
解答:
解:1÷
5
4
=
4
5
4+
4
3
=5
1
3
4
9
÷2=
2
9
9
25
×
2
3
=
6
25
1
6
÷1.2=
5
36
0.32+
2
25
=0.4,
4
5
-0.2=0.6,
0.8+0.39=1.19,
3
4
×12=9,
3
8
+0.8=1.175,
2÷
5
6
=2.4,
3
28
×34=
51
14
1
4
+
1
6
=
5
12
3
5
×
2
3
=
2
5
4
7
×
3
4
=
3
7
1
2
÷
2
5
=
5
4
点评:本题考查了分数的四则运算,计算时要细心,根据运算法则直接求解即可,要注意:把结果化成最简分数.
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