1992+19921992+199219921992除以1998+19981998的简便运算
(1992+19921992+199219921992)÷(1998+19981998+199819981998)
=1992*(1+10001+100010001)÷1998*(1+10001+100010001)
=1992/1998
=1998-6/1998
=1998/1998-6/1998
=1-1/333
=332/333
前三个=1992【1+10001+100010001】
(1992+6+19921992+60006+199219921992+600060006)-(6+60006+600060006)除以1998+19981998+199819981998=1-1/600060018
(1992+19921992+199219921992)÷(1998+19981998+199819981998)
=1992(1+10001+100010001)÷1998(1+10001+100010001)
=1992/1998
=332/333
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