50又1/3 x 49又2/3 用简便方法计算

问题描述:

50又1/3 x 49又2/3 用简便方法计算

50又1/3 x 49又2/3
=(50+1/3)×(50-1/3)
=50²-(1/3)²
=2500-1/9
=2499又8/9