问题 解答题
先在横线里填数,使计算简便,然后再计算.
5
7
×
1
4
×______
11
8
×
11
26
×______
______×
2
5
×18.
答案

(1)

5
7
×
1
4
×4,

=

5
7
×(
1
4
×4),

=

5
7
×1,

=

5
7

(2)

11
8
×
11
26
×
26
11

=

11
8
×(
11
26
×
26
11
),

=

11
8
×1,

=

11
8

(3)

5
2
×
2
5
×18.

=(

5
2
×
2
5
)×18,

=1×18,

=18.

故答案为:4、

26
11
5
2

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