问题 解答题

下面各题,怎样算简便就怎样算.

6.2-0.54÷1.8×53.6×0.81+0.36×1.927.6-11.31-5.694.05÷[1.8×(3.36-2.86)].

答案

(1)6.2-0.54÷1.8×5

=6.2-1.5,

=4.7;

(2)3.6×0.81+0.36×1.9

=3.6×0.81+3.6×0.19,

=(0.81+0.19)×3.6,

=3.6;

(3)27.6-11.31-5.69

=27.6-(11.31+5.69),

=27.6-17,

=10.6;

(4)4.05÷[1.8×(3.36-2.86)]

=4.05÷[1.8×0.5],

=4.05÷0.9,

=4.5.

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