7分之2加9分之7等于? 1减(9分之5减8分之3)等于?

2025-04-04 03:08:08
推荐回答(1个)
回答1:

2/7+7/9
=18/63+49/63
=67/63
=1又4/63

1-(5/9-3/8)
=1-13/72
=59/72