一道数学简算(987+4097×986)÷(987×4097-3110)怎么简算?

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一道数学简算(987+4097×986)÷(987×4097-3110)怎么简算?
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一道数学简算(987+4097×986)÷(987×4097-3110)怎么简算?
一道数学简算
(987+4097×986)÷(987×4097-3110)
怎么简算?

一道数学简算(987+4097×986)÷(987×4097-3110)怎么简算?
(987+4097×986)÷(987×4097-3110)
=(987+4097×986)÷[(986+1)×4097-3110]
=(987+4097×986)÷[986×4097+1×4097-3110]
=(987+4097×986)÷[976×4097+987]
=1

(987+4097×986)÷(987×4097-3110)
=(987+4097×986)÷(986×4097+4097-3110)
=(987+4097×986)÷(986×4097+987)
=1

(4097-3110+4097*986)÷(987*4097-3110)
=(4097*987-3110)÷(987*4097-3110)
=1