问题 解答题
直接写出得数.
28+46=
5.7+2.35=
4
7
+
3
7
=
9
10
÷3
=
1
2
-
1
3
=
50×40=
1-0.9=
5
6
×
8
15
=
答案

28+46=74,5.7+2.35=8.05,
4
7
+
3
7
=1,
9
10
÷3
=0.3,
1
2
-
1
3
=
1
6
50×40=2000,
1-0.9=0.1,
5
6
×
8
15
=
4
9

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