(2.65+2.77)/(1.98-0.98)怎么简便计算
问题描述:
(2.65+2.77)/(1.98-0.98)怎么简便计算
答
(2.65+2.77)/(1.98-0.98)
=【2.62+(0.03+2.77)】/【(1+0.98)-0.98】
=【2.62+2.8】/【1-(0.98-0.98)】
=5.42/1
=5.42