89×57⼀88 简便运算

2025-04-01 22:45:37
推荐回答(2个)
回答(1):

89×57/88
=(88+1)×57/88
=88×57/88+57/88
=57+57/88
=57又57/88

回答(2):

89×57/88
=(88-1)×57/88
=57-57/88
=56又31/88