问题 解答题
口算:
3
4
+
1
2
=______
1
3
-
1
4
=______ 12×
3
4
=______
1
5
÷3=______
20÷
4
9
=______
5
7
÷1=______
2
3
×
7
8
=______
7
10
×
3
10
+
3
10
×
3
10
=______
7
12
×______=
1
3
4
5
÷______=
4
3
答案

3
4
+
1
2
=
5
4
1
3
-
1
4
=
1
12
12×
3
4
=9
1
5
÷3=
1
15
20÷
4
9
=45

5
7
÷1=
5
7
2
3
×
7
8
=
7
12
7
10
×
3
10
+
3
10
×
3
10
=
3
10
7
12
×
4
7
=
1
3
4
5
÷
3
5
=
4
3

故答案为:

5
4
1
12
、9、
1
15
、45、
5
7
7
12
3
10
4
7
3
5

单项选择题
单项选择题