问题 解答题
口算:
32+22=
2.25+
3
4
=
4
7
÷4
=
8-
4
5
=
0.21×
3
4
+0.21÷4
=
21÷4=1÷(
1
10
÷
1
8
)
=
1
5
÷5×25
=
5
9
+
1
5
-
5
9
=
1-
11
13
-
2
13
=
答案

32+22=132.25+
3
4
=3
4
7
÷4
=
1
7
8-
4
5
=7
1
5
0.21×
3
4
+0.21÷4
=0.21
21÷4=5.251÷(
1
10
÷
1
8
)
=
5
4
1
5
÷5×25
=1
5
9
+
1
5
-
5
9
=
1
5
1-
11
13
-
2
13
=0.

单项选择题
单项选择题