一减19分之2减19分之七用简便运算怎么算?

2025-04-19 14:34:45
推荐回答(2个)
回答1:

1 - 2/19 - 7/19
= 19/19 - 9/19
= 10/19

回答2:

1-2/19-7/19
=1-(2/19+7/19)
=1-9/19
=10/19