题目内容

谁做得对,奖他(她)一面
(1)1
6
7
-
6
7
×
5
6

=1×
1
6

=
5
6

______
1
6
7
-
6
7
×
5
6

=1
6
7
-
5
7

=1
1
7

______
(2)72×
5
8
÷72×
5
8

=72×
5
8
1
72
×
5
8

=
25
64

______
72×
5
8
÷72×
5
8

=(72×
5
8
)÷(72×
5
8

=1
______.
(1)1
6
7
-
6
7
×
5
6

=1
6
7
-
5
7

=1
1
7


(2)(2)72×
5
8
÷72×
5
8

=72×
5
8
×
1
72
×
5
8

=(72×
1
72
)×(
5
8
×
5
8
),
=1×=
25
64

=
25
64

故答案为:×,,×.
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