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7/18括号3/4-1/8括号的递等式怎么列

前面-1/4,后面恕我每笔口算不出

1/8+1/3-1/4÷(1/24) =1/8+1/3-6 =3/24+8/24-6 =11/

[4/5-3/10]×[5/8+3/16] =1/2x13/16 =13/32

[1-(1/4+3/8)]÷1/4 =[1-(2/8+3/8)]x4 =[1-5/8]x4 =

4/3(2/5+3/1O丿=4O/3O一{I2/30+9/3o)=4o/30_21/3o=丨9/3

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