问题
解答题
简便算法
17.08×2.53-7.08×2.53
100×0.97×99+3×99
19.25×9.5+19.25×0.4+0.1×19.25.
答案
(1)17.08×2.53-7.08×2.53,
=(17.08-7.08)×2.53,
=10×2.53,
=25.3;
(2)100×0.97×99+3×99,
=97×99+3×99,
=(97+3)×99,
=100×99,
=9900;
(3)19.25×9.5+19.25×0.4+0.1×19.25,
=19.25×(9.5+0.4+0.1),
=19.5×10,
=195.