问题 解答题
下面各题怎样算简便就怎样算.
72.8÷5.6+24.95.8×13.7+5.8×6.349×101-49
2.5×32×1.253.9÷1.5÷232.7+0.14×50.
答案

(1)72.8÷5.6+24.9,

=13+24.9,

=37.9;

(2)5.8×13.7+5.8×6.3,

=(13.7+6.3)×5.8,

=20×5.8,

=116;

(3)49×101-49,

=(101-1)×49,

=100×49,

=4900;

(4)25×32×1.25,

=(25×4)×(1.25×8),

=100×10,

=1000;

(5)3.9÷1.5÷2,

=3.9÷(1.5×2),

=3.9÷3,

=1.3;

(6)32.7+0.14×50,

=32.7+7,

=39.7.

单项选择题 共用题干题
填空题