1.(204+584*191)/(192*584-380)-5/89
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1.(204+584*191)/(192*584-380)-5/89
2.1/(1*5)+1/(5*9)+1/(9*13)+1/(13*17)+1/(17*21)+1/(21*25)
3.(18/5)*2354+(3823/5)*36
说得不太清楚哦,第1个怎么拆啊?
2.1/(1*5)+1/(5*9)+1/(9*13)+1/(13*17)+1/(17*21)+1/(21*25)
3.(18/5)*2354+(3823/5)*36
说得不太清楚哦,第1个怎么拆啊?
![1.(204+584*191)/(192*584-380)-5/89](/uploads/image/z/17613778-58-8.jpg?t=1.%EF%BC%88204%2B584%2A191%EF%BC%89%2F%EF%BC%88192%2A584-380%EF%BC%89-5%2F89)
1、=(204+(584*192-584))/(192*584-380)-5/89
=(192*584-380)/(192*584-380)-5/89
=1-5/89
=84/89
2、=1/5+1/(5*9)+1/(9*13)+1/(13*17)+1/(17*21)+1/(21*25)
=2/9+1/(9*13)+1/(13*17)+1/(17*21)+1/(21*25)
=3/13+1/(13*17)+1/(17*21)+1/(21*25)
=4/17+1/(17*21)+1/(21*25)
=5/21+1/(21*25)
=6/25
3、=18*2354/5+3823*36 /5
=36*1177/5+3823*36 /5
=36*5000/5
=36*1000
=36000
=(192*584-380)/(192*584-380)-5/89
=1-5/89
=84/89
2、=1/5+1/(5*9)+1/(9*13)+1/(13*17)+1/(17*21)+1/(21*25)
=2/9+1/(9*13)+1/(13*17)+1/(17*21)+1/(21*25)
=3/13+1/(13*17)+1/(17*21)+1/(21*25)
=4/17+1/(17*21)+1/(21*25)
=5/21+1/(21*25)
=6/25
3、=18*2354/5+3823*36 /5
=36*1177/5+3823*36 /5
=36*5000/5
=36*1000
=36000
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