问题 解答题
简便计算
5
6
+
2
9
-
7
18
)×36
5
7
×16.31-2.31÷140%
答案

5
6
+
2
9
-
7
18
)×36,

=

5
6
×36+
2
9
×
36-
7
18
×
36,

=30+8-14,

=24;

5
7
×16.31-2.31÷140%,

=

5
7
×16.31-2.31÷
7
5

=

5
7
×16.31-2.31×
5
7

=

5
7
×(16.31-2.31),

=

5
7
×14,

=10.

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