用几种方法计算“25x48”

2024-11-23 23:12:28
推荐回答(5个)
回答1:

方法一:25x48=25x4x12
=100x12
=1200.
方法二:25x48=25x(40+4x2)
=25x40+25x4x2
=1000+100x2
=1000+200
=1200.
方法三:25x48=25x(50-2)
=25x50-25x2
=1250-50
=1200.
方法四:25x48=(100/4)x48
=(100x48)/4
=100x12
=1200.

回答2:

 

回答3:

 

回答4:

方法一共有200多种

回答5:

3