问题 解答题
直接写出得数.
0.2+0.5=
5.2-0.8=10-2.5=
210÷3=23×100=
3
7
+
3
7
=
3
10
+
5
10
=
9
12
-
3
12
=
3
8
+
3
8
=
2
5
-
1
5
=
答案

0.2+0.5=0.7,5.2-0.8=4.4,10-2.5=7.5,
210÷3=70,23×100=2300,
3
7
+
3
7
=
6
7
3
10
+
5
10
=
4
5
9
12
-
3
12
=
1
2
3
8
+
3
8
=
3
4
2
5
-
1
5
=
1
5

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