564-56+47用简便方法?

2025-02-23 22:37:08
推荐回答(3个)
回答1:

564-(56-47)

回答2:

564-56+47
=564-(56-47)
=564-9
=555

回答3:

564-56+47
=564-(60-4)+(50-3)
=564-60+4+50-3
=504+50+(4-3)
=554+1
=555