问题 解答题
2.5+3.7=217÷7=70-34=
1.2×0.5=1.3+27=1.5÷0.5=
4.5-0.5=25×0.4=
3
8
×
4
9
=
1
3
-
1
5
=
35×
4
7
=
2
15
+
3
5
=
3
8
=
2
5
+
1
2
=
8
9
-
5
9
=
7
10
÷
7
17
=
答案

2.5+3.7=6.2,217÷7=31,70-34=36,
1.2×0.5=0.6,1.3+27=28.3,1.5÷0.5=3,
4.5-0.5=4,25×0.4=10,
3
8
×
4
9
=
1
6
1
3
-
1
5
=
2
15
35×
4
7
=20,
2
15
+
3
5
=
11
15
3
8
=24,
2
5
+
1
2
=
9
10
8
9
-
5
9
=
1
3
7
10
÷
7
17
=
17
10

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