25⼀2*21+25⼀21*+2简便计算怎么算?

2025-04-15 02:02:25
推荐回答(2个)
回答1:

简便计算
2/25×21+21/25×23
=21/25×2+21/25×23
=21/25×(2+23)
=21/25×25
=21

回答2:

25/2*21+25/21÷2
=25/2*21+25/2*21
=2*25/2*21
=525.