问题 填空题
速算题
4
9
-
2
9
=______
3
7
+
2
7
=______
4
5
=______
3
7
÷6
=______
3
5
8
+5
3
8
=______
0.25+
1
3
=______.
答案

4
9
-
2
9
=
2
9
3
7
+
2
7
=
5
7
4
5
=1
3
5

3
7
÷6=
1
14
3
5
8
+5
3
8
=9 0.25+
1
3
=
7
12

故答案为:

2
9
5
7
,1
3
5
1
14
,9,
7
12

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