问题 解答题
计算下面各题,能简算的要简算
7.65-0.65×69.43-1.68-4.321.25×0.76×0.8
0.32×7.5-0.32×4.53.8×10.19.9÷[16.5-(1.7+3.8)].
答案

(1)7.65-0.65×6,

=7.65-3.9,

=3.75;

(2)9.43-1.68-4.32,

=9.43-(1.68+4.32),

=9.43-6,

=3.43;

(3)1.25×0.76×0.8,

=(1.25×0.8)×0.76,

=1×0.76,

=0.76;

(4)0.32×7.5-0.32×4.5,

=0.32×(7.5-4.5),

=0.32×3,

=0.96;

(5)3.8×10.1,

=3.8×(10+0.1),

=38+0.38,

=38.38;

(6)9.9÷[16.5-(1.7+3.8)],

=9.9÷[16.5-5.5],

=9.9÷11,

=0.9.

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