问题 解答题
56-47=10-0.27=5-2.5=6.3+0.7=6÷0.5=
8.4÷4.2=2.5×4=1-
2
3
=
1
3
+
1
2
=
1
4
+
3
4
=
8
3
÷
8
3
=
9÷10=
5
6
-
2
3
=
4
5
-
1
2
=
5
9
×18
=
1
2
×
1
2
=
2
13
×2
=
5
6
=
8
9
÷4
=
5
26
×13
=
2
7
=
12×
2
3
=
5
6
×
2
5
=
2
3
×
3
4
=
4
5
÷
1
5
=
1
8
=
4
7
×
7
8
=
5
6
=
1
4
÷
1
3
=
6
7
÷
3
14
=
答案

56-47=9,10-0.27=9.73,5-2.5=2.5,6.3+0.7=7,6÷0.5=12,
8.4÷4.2=2,2.5×4=10,1-
2
3
=
1
3
1
3
+
1
2
=
5
6
1
4
+
3
4
=1,
8
3
÷
8
3
=1,
9÷10=0.9,
5
6
-
2
3
=
1
6
4
5
-
1
2
=
3
10
5
9
×18
=10,
1
2
×
1
2
=
1
4
2
13
×2
=
4
13
5
6
=0,
8
9
÷4
=
2
9
5
26
×13
=
5
2
2
7
=21,
12×
2
3
=8,
5
6
×
2
5
=
1
3
2
3
×
3
4
=
1
2
4
5
÷
1
5
=4,
1
8
=8,
4
7
×
7
8
=
1
2
5
6
=6,
1
4
÷
1
3
=
3
4
6
7
÷
3
14
=4.

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