8分之3加7分之3减9分之2加4分之1等于几?要过程!

2025-03-10 00:36:32
推荐回答(3个)
回答1:


如图所示

回答2:


见图

回答3:

3/8+3/7-2/9+1/4
=3/8+1/4+3/7-2/9
=3/8+2/8+27/63-14/63
=5/8+13/63
=315/504+104/504
=419/504