问题 解答题
能简算的要写出简算过程).
27.25-(3.86+7.25)
2000
2001
×2002.
答案

(1)27.25-(3.86+7.25),

=27.25-3.86-7.25,

=27.25-7.25-3.86,

=20-3.86,

=16.14;

(2)

2000
2001
×2002,

=

2000
2001
×(2001+1),

=

2000
2001
×2001+1×
2000
2001

=2000+

2000
2001

=2000

2000
2001

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