问题 解答题
直接写出得数.
300-297=
3
4
+
1
2
=
5×4.8=
2
3
÷
4
5
=
5
7
÷
5
14
=
3
8
+
1
4
=
5
6
×
8
15
=
4.9÷0.7=3,1×8.9≈
4
5
-
2
3
+
2
3
=
答案

300-297=3,
3
4
+
1
2
=
5
4
5×4.8=24,
2
3
÷
4
5
=
5
6
5
7
÷
5
14
=2,
3
8
+
1
4
=
5
8
5
6
×
8
15
=
4
9
4.9÷0.7=7,3.1×8.9≈27,
4
5
-
2
3
+
2
3
=
4
5

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