问题 解答题

计算.

3.8+5.6÷0.7×4

[7.6-(1.8+0.28)]×1.5             

520-13.5×6.

答案

(1)3.8+5.6÷0.7×4,

=3.8+8×4,

=3.8+32,

=35.8;

(2)[7.6-(1.8+0.28)]×1.5,

=(7.6-2.08)×1.5,

=9.68×1.5,

=14.52;

(3)520-13.5×6,

=520-81,

=439.

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