问题 解答题
用简便方法计算.
329×101
54×98+46×983000÷125
800÷25(125×25)×857×15+42×15+15.
答案

(1)329×101,

=329×(100+1),

=329×100+329×1,

=32900+329,

=33229;

(2)54×98+46×98,

=(54+46)×98,

=100×98,

=9800;

(3)3000÷125,

=(3000×8)÷(125×8),

=24000÷1000,

=24;

(4)800÷25,

=(800×4)÷(25×4),

=3200÷100,

=32;

(5)(125×25)×8,

=125×8×25,

=1000×25,

=25000;

(6)57×15+42×15+15,

=(57+42+1)×15,

=100×15,

=1500.

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