2.5x2.5+2.5x7的简便运算

2.5x2.5+2.5x7的简便运算
2024-11-30 17:33:36
推荐回答(3个)
回答1:

2.5*2.5+2.5*7

=2.5*(2.5+7)
=2.5*9.5
=2.5*10-2.5*0.5
=25-1.25
=23.75

回答2:


回答3:

=2.5*(2.5+7)
=2.5*9.5
=2.5*(10-0.5)
=2.5*10-2.5*0.5
=25-1.25
=23.75