问题
解答题
下面各题怎样算简便就怎样算.
|
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.