(50+1/3)×(49+2/3)等于多少?

问题描述:

(50+1/3)×(49+2/3)等于多少?

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