问题 解答题
简便计算.
44×25
204×15
365-73-27(25.8+7.5)+2.5.
答案

(1)44×25

=11×(4×25),

=11×100,

=1100;

(2)204×15

=(200+4)×15,

=200×15+4×15,

=3000+60,

=3060;

(3)365-73-27

=365-(73+27),

=365-100,

=265;

(4)(25.8+7.5)+2.5

=25.8+(7.5+2.5),

=25.8+10,

=35.8.

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