问题 解答题
2.5×40=18×60=1.73+2.07=
10-0.9=400÷0.4=
1
2
+
1
2
=
2
3
-
1
3
=
1
5
+
1
4
=
3
4
-
1
2
=
1
6
-
1
7
=
答案

2.5×40=10018×60=10801.73+2.07=3.8
10-0.9=9.1400÷0.4=1000
1
2
+
1
2
=1
2
3
-
1
3
=
1
3
1
5
+
1
4
=
9
20
3
4
-
1
2
=
1
4
1
6
-
1
7
=
1
42

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