问题 解答题
下面各题怎样算简便就怎样算.
24.68+(6.35-4.68)82.9-13.68-2.324.2×99+4.2
48×1.252.5÷(0.5×0.25)0.065×430+65×0.57.
答案

(1)24.68+(6.35-4.68),

=24.68-4.68-6.35,

=20-6.35,

=13.65;

(2)82.9-13.68-2.32,

=82.9-(13.68+2.32),

=82.9-16,

=66.9;

(3)4.2×99+4.2,

=4.2×(99+1),

=4.2×100,

=420;

(4)48×1.25,

=6×(8×1.25),

=6×10,

=60;

(5)2.5÷(0.5×0.25),

=2.5÷0.5÷0.25,

=5÷0.25,

=20;

(6)0.065×430+65×0.57,

=65×(0.43+0.57),

=65×1,

=65.

单项选择题 A1/A2型题
填空题