问题 解答题
下面各题,怎样算简便就怎样算
102×4.50.25×4.84.25×3.7-0.37×32.5
5.23×4+4.77÷0.256.67-(4.54-3.33)28.6×101-28.6.
答案

(1)102×4.5

=(100+2)×4.5,

=100×4.5+2×4.5,

=450+9,

=459;

(2)0.25×4.8

=0.25×4×1.2,

=1×1.2,

=1.2;

(3)4.25×3.7-0.37×32.5

=42.5×0.37-0.37×32.5,

=(42.5-32.5)×0.37,

=10×0.37,

=3.7;

(4)5.23×4+4.77÷0.25

=5.23×4+4.77÷

1
4

=5.23×4+4.77×4,

=(5.23+4.77)×4,

=10×4,

=40;

(5)6.67-(4.54-3.33)

=6.67+3.33-4.54,

=10-4.54,

=5.46;

(4)28.6×101-28.6

=28.6×(100+1)-28.6,

=28.6×100+28.6×1-28.6,

=2860+(28.6-28.6),

=2860+0,

=2860.

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