题目内容

直接写得数.
5
9
=
1
8
÷
1
8
=
4
5
÷
4
3
=
1
5
÷5÷
1
5
=
3
7
÷
2
21
=
4
9
×
3
10
=
5
9
÷25=
1
2
÷
1
4
=
12÷
3
4
=
1
5
-
1
6
=
2
3
-
1
2
=
1
2
×
1
3
÷
1
2
=
分析:利用分数的加法、减法、乘法、和除法的计算方法解答,能约分的要约分.
解答:解:
5
9
=5,
1
8
÷
1
8
=1,
4
5
÷
4
3
=
3
5
1
5
÷5÷
1
5
=
1
5
3
7
÷
2
21
=
9
2
4
9
×
3
10
=
2
15
5
9
÷25=
1
45
1
2
÷
1
4
=40,
12÷
3
4
=16,
1
5
-
1
6
=
1
30
2
3
-
1
2
=
1
6
1
2
×
1
3
÷
1
2
=
1
3
故答案为:5,1,
3
5
1
5
9
2
2
15
1
45
,40,16,
1
30
1
6
1
3
点评:本题主要考查分数的加法、减法、乘法、和除法的计算方法,注意能约分的要约分.
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