5⼀12减1⼀7加7⼀12减5⼀7等于几分之几?1减1⼀2减1⼀4减1⼀8减1⼀16等于多少?

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2024-11-29 01:30:10
推荐回答(1个)
回答1:

5/12-1/7+7/12-5/7
=35/84-12/84+49/84-60/84
=(35-12+49-60)/84
=12/84
=3/41
1-1/2-1/4-1/8-1/16
=(16-8-4-2-1)/16
=1/16