用简便方法计算 4×9×25 250×16 125×32 40×(9×25)

如题所述

第1个回答  2020-06-21
(1)4×9×25
=4×25×9
=100×9
=900;

(2)250×16
=250×(4×4)
=250×4×4
=1000×4
=4000;

(3)125×32
=125×(8×4)
=125×8×4
=1000×4
=4000;

(4)40×(9×25)
=40×25×9
=1000×9
=9000.