问题 解答题
直接写出得数:
1787-998=______;
5
8
+0.25=______;
10
21
×
3
5
=______;
21÷
3
7
=______;
5
9
×
1
5
÷
5
9
×
1
5
=______;
1
8
÷
1
8
÷
1
8
=______;
1
11
×12.1-1=______;
3
5
+
2
5
÷
1
5
=______.
答案

1787-998=789;
5
8
+0.25=0.875;
10
21
×
3
5
=
2
7
21÷
3
7
=49;
5
9
×
1
5
÷
5
9
×
1
5
=
1
25
1
8
÷
1
8
÷
1
8
=8;
1
11
×12.1-1=0.1;
3
5
+
2
5
÷
1
5
=2
3
5
故答案为:789,0.875,
2
7
,49,
1
25
,8,0.1,2
3
5

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