75x19 25x43用简便算法怎么算

Question

75x19 25x43用简便算法怎么算

Answer 1

75×19+25×43
=（25×3）×19+25×43
=25×（3×19）+25×43
=25×57+25×43
=25×（57+43）
=25×100
=2500本回答被网友采纳