17×97+51怎样简便?
问题描述:
17×97+51怎样简便?
答
17×97+51=17×97+3×17
=17×(97+3)=17×100
=1700
17×97+51怎样简便?
17×97+51=17×97+3×17
=17×(97+3)=17×100
=1700