7⼀8+1⼀6-5⼀9,要过程3⼀4+5⼀6-7⼀12,17⼀13-(4⼀13+2⼀18)?

2024-11-09 04:52:45
推荐回答(3个)
回答1:

7/8+1/6-5/9

=25/24-5/9

=35/72

3/4+5/6-7/12

=19/12-7/12

=1

17/13-(4/13+2/18)

=17/13-49/117

=8/9

回答2:

●7/8+1/6-5/9
=(21/24+4/24)-5/9
=25/24-5/9
=75/72-40/72
=35/72
●3/4+5/6-7/12
=9/12+10/12-7/12
=12/12
=1
●17/13-(4/13+2/18)
=(17/13-4/13)-1/9
=1-1/9
=8/9

回答3:

7/8+1/6-5/9
=21/24+4/24-5/9
=25/24-5/9
=75/72-40/72
=35/72
3/4+5/6-7/12
=9/12+10/12-7/12
=19/12-7/12
=12/12
=1
17/13-(4/13+2/18)
=17/13-4/13-2/18
=1-2/18
=8/9