问题 解答题
34×20=50×60=1.4+1.2=440÷4=
900÷3=0.8-0.3=
1
3
+
2
3
=
5
8
-
3
8
=
7
9
-
7
9
=
2
5
+
3
5
=
答案

34×20=68050×60=30001.4+1.2=2.6440÷4=110
900÷3=3000.8-0.3=0.5
1
3
+
2
3
=1
5
8
-
3
8
=
1
4
7
9
-
7
9
=0
2
5
+
3
5
=1

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