题目内容

直接写出得数.
27+18=
21.7+3=15-0.4=1.2×0.3=24.8÷4=
1
3
+
1
4
=
1
3
-
1
5
=
2
3
×
3
4
=
12÷
3
4
=
5
6
×2.4=
27+18=45,21.7+3=24.7,15-0.4=14.6,1.2×0.3=0.36,24.8÷4=6.2,
1
3
+
1
4
=
7
12
1
3
-
1
5
=
2
15
2
3
×
3
4
=
1
2
12÷
3
4
=16,
5
6
×2.4=2.
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