问题 解答题
在空格里填上适当的数,使横、竖行三个数之和都是
3
2
______
11
16
9
16
1
2
____________
____________
3
8
答案

(1)

3
2
-(
11
16
+
9
16
),

=

3
2
-
5
4

=

1
4

(2)

3
2
-
1
4
-
1
2

=1-

1
4

=

3
4

(3)

3
2
-
3
4
-
3
8

=

3
4
-
3
8

=

3
8

(4)

3
2
-
9
16
-
3
8

=

3
2
-
15
16

=

9
16

(5)

3
2
-
1
2
-
9
16

=1-

9
16

=

7
16

故答案为:

1
4
11
16
9
16
1
2
7
16
9
16
3
4
3
8
3
8

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