题目内容

直接写得数.
7
18
×
3
14
=
100×
3
25
=
5
6
×
4
7
=
19
24
×
3
19
=
7
20
÷14=
6
7
÷
5
6
=
7
10
÷
2
5
=
31
90
÷62=
7
8
÷
1
2
=
10
13
÷25=
22
15
÷
11
9
=
3
10
÷
2
5
=
21×
3
8
×
1
21
=
4
3
÷18×
5
6
=
5
7
×
4
15
÷
12
13
=
5
12
÷
3
4
÷
5
6
=
考点:分数乘法,分数除法,分数的四则混合运算
专题:计算题
分析:本题根据分数乘法与除法的运算法则计算即可,21×
3
8
×
1
21
可根据乘法交换律计算.
解答: 解:
7
18
×
3
14
=
1
12
100×
3
25
=12
5
6
×
4
7
=
10
21
19
24
×
3
19
=
1
8
7
20
÷14=
1
40
6
7
÷
5
6
=
36
35
7
10
÷
2
5
=
7
4
31
90
÷62=
1
180
7
8
÷
1
2
=
7
4
10
13
÷25=
2
65
22
15
÷
11
9
=
6
5
3
10
÷
2
5
=
3
4
21×
3
8
×
1
21
=
3
8
4
3
÷18×
5
6
=
5
81
5
7
×
4
15
÷
12
13
=
13
63
5
12
÷
3
4
÷
5
6
=
2
3
点评:完成本题要细心,注意约分.
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