问题 解答题
1
2
×
2
5
=______
5
7
÷
2
7
=______
1
2
÷
1
4
=______
1
3
=______
10÷
1
8
×8=______
5
14
×7=______
3
5
+
2
5
=______
100×
7
20
=______
3
16
=______
3
8
÷
3
8
×
5
6
=______
1
4
+
1
3
=______
1
4
=______
2
9
=______
7
12
÷
7
12
=______
1
4
÷4×
1
4
=______
5
6
×36=______
3
10
=______
10÷
5
9
=______
6
5
÷
3
5
=______
5
9
×
3
5
×3=______
2
7
×14=______
2
9
×
3
5
=______
1
2
×3=______
6
11
×
11
6
=______
9×(2+
5
9
)=______
70÷
7
10
=______
19×
1
38
=______
4
5
÷8%=______
7
8
=______
3
4
×
3
8
=______.
答案

1
2
×
2
5
=
1
5
5
7
÷
2
7
=
5
2
1
2
÷
1
4
=2,
1
3
=9,
10÷
1
8
×8=640,
5
14
×7=
5
2
3
5
+
2
5
=1,
100×
7
20
=35,
3
16
=
3
2
3
8
÷
3
8
×
5
6
=
5
6
1
4
+
1
3
=
7
12
1
4
=0,
2
9
=
2
9
7
12
÷
7
12
=1,
1
4
÷4×
1
4
=
1
16
5
6
×36=30,
3
10
=10,
10÷
5
9
=18,
6
5
÷
3
5
=2,
5
9
×
3
5
×3=1,
2
7
×14=4,
2
9
×
3
5
=
2
15
1
2
×3=
3
2
6
11
×
11
6
=1,
9×(2+
5
9
)=23,
70÷
7
10
=100,
19×
1
38
=
1
2
4
5
÷8%=10,
7
8
=
8
7
3
4
×
3
8
=0.

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