问题 解答题

怎样简便怎样算.

1.73×3.5+3.5×4.27

3.36×2.5×0.4.

答案

(1)1.73×3.5+3.5×4.27,

=(1.73+4.27)×3.5,

=6×3.5,

=21;

(2)3.36×2.5×0.4,

=3.36×(2.5×0.4),

=3.36×1,

=3.36.

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