6161×39-3939×61的简便方法

2025-02-24 03:59:57
推荐回答(1个)
回答1:

原式
=61x101x39-39x101x61
=61x101x(39-39)
=61x101x0
=61x101x0
=0

或者
=61x101x39-39x101x61
=(61-61)x101x39
=0x101x39
=0x39
=0

……