问题:
问题描述:
8又2/5(五分之二)×(20-5又5/6[六分之五])===简便计算
路献辉回答:
8又2/5(五分之二)×(20-5又5/6[六分之五])
=(42/5)×(15-5/6)
=(42/5)×15-(42/5)×(5/6)
=126-7
=119