问题 解答题

简便运算

(1)4.38-2.85+3.62-5.15

(2)0.25×1.9×0.5×4.

答案

(1)4.38-2.85+3.62-5.15,

=4.38+3.62-(2.85+5.15),

=8-8,

=0;

(2)0.25×1.9×0.5×4,

=(0.25×4)×(1.9×0.5),

=1×0.95,

=0.95.

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