问题 解答题
怎样简便怎样算.
18.76×9.9+1.876       
3.52÷2.5÷0.4     3.65×10.1
1.25×2.5×32           3.9-4.1+6.1-5.9       3.75-(3.75+6.48)
15.6×13.1-15.6-15.6×2.1             56.5×9.9+5.65.
答案

(1)18.76×9.9+1.876,

=18.76×9.9+18.76×0.1,

=18.76×(9.9+0.1),

=18.76×10,

=187.6;

(2)3.52÷2.5÷0.4,

=3.52÷(2.5×0.4),

=3.52÷1,

=3.52;

(3)3.65×10.1,

=3.65×(10+0.1),

=3.65×10+3.65×0.1,

=36.5+0.365,

=36.865;

(4)1.25×2.5×32,

=1.25×2.5×(4×8),

=(1.25×8)×(2.5×4),

=10×10,

=100;

(5)3.9-4.1+6.1-5.9,

=(3.9+6.1)-(4.1+5.9),

=10-10,

=0;

(6)3.75-(3.75+6.48),

=3.75-3.75-6.48,

=0-6.48,

=-6.48;

(7)15.6×13.1-15.6-15.6×2.1,

=15.6×(13.1-1-2.1),

=15.6×10,

=156;

(8)56.5×9.9+5.65,

=5.65×99+5.65,

=5.65×(99+1),

=5.65×100,

=565.

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