问题 解答题
直接写出得数.
4.2+3.98=
1.37-0.7=
1.92÷0.04=
1
3
+
1
4
=
1
4
-
2
7
=
1
2
-
2
5
+
4
7
=
答案

4.2+3.98=8.151.37-0.7=0.67
1.92÷0.04=48
1
3
+
1
4
=
7
12
1
4
-
2
7
=-
1
28
1
2
-
2
5
+
4
7
=
47
70
故答案为:8.15,0.67,48,
7
12
,-
1
28
47
70

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