问题
解答题
利用你发现的规律,计算下列各题.
20×18×50
(45×25)×2×4
38×125×8×3
79×5×20.
答案
(1)20×18×50
=20×50×18,
=1000×18,
=18000;
(2)(45×25)×2×4
=45×2×(25×4),
=90×100,
=9000;
(3)38×125×8×3
=38×3×(125×8),
=114×1000,
=114000;
(4)79×5×20
=79×(5×20),
=79×100,
=7900.