问题 解答题

用简便算法计算:

(1)25×32×125

(2)28×1111+9999×8.

答案

(1)25×32×125,

=(25×4)×(8×125),

=100×1000,

=100000;

(2)28×1111+9999×8,

=28×1111+1111×72,

=(28+72)×1111,

=100×1111,

=111100.

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