问题 解答题
直接写得数
1-
2
15
=
12-12×0.1=
1
2
-
1
3
=
0.3+
7
10
=
1.66÷2=
1
4
+
3
10
=
7-
5
7
=
23+52=
4
5
-0.75=
50×25×1.2=
答案

1-
2
15
=
13
15
12-12×0.1=10.8,
1
2
-
1
3
=
1
6
0.3+
7
10
=1,
1.66÷2=0.83,
1
4
+
3
10
=
11
20
7-
5
7
=6
2
7
23+52=33,
4
5
-0.75=0.05,
50×25×1.2=1500.

单项选择题
单项选择题