简便计算 83*81/82
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简便计算 83*81/82
简便计算 83*81/82
简便计算 83*81/82
(82+1)*81/82
=81+81/82 用乘法分配律
=81又81/82
=83*(81/82+1/82)-1/82
=83-1/82
=82又81/82
81.98780487804878048780487804878
(82+1)*81/82+81+81/82
简便计算 83*81/82
简便计算 83*81/82
简便计算 83*81/82
(82+1)*81/82
=81+81/82 用乘法分配律
=81又81/82
=83*(81/82+1/82)-1/82
=83-1/82
=82又81/82
81.98780487804878048780487804878
(82+1)*81/82+81+81/82