7⼀10-(3⼀4-2⼀5)简便计算?

2025-04-05 10:17:54
推荐回答(3个)
回答(1):

7/10-(3/4-2/5)
=14/20-(15/20-8/20)
=14/20-7/20
=7/20

回答(2):

我写给你计算过程:
7/10-(3/4-2/5)
=7/10-3/4+2/5
=(7/10+2/5)-3/4
=(7/10+4/10)-3/4
=11/10-3/4
=22/20-15/20
=7/20

回答(3):

7/10-(3/4-2/5)
=7/10-3/4+2/5
=14/20-15/20+8/20
=14/20+8/20-15/20
=22/20-15/20
=7/20