脱式计算。7⼀8-4⼀7×7⼀8 = = = =

2024-11-07 16:39:04
推荐回答(3个)
回答(1):

(7/8)-(4/7)x(7/8)
=(7/8)(1- 4/7)
=(7/8)x(3/7)
=3/8

回答(2):

7/8-4/7×7/8
=7/8-4/8
=3/8

回答(3):

应该是 3/8