98.766×987.68-98.765×987.69用递等式简算
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98.766×987.68-98.765×987.69用递等式简算98.766×987.68-98.765×987.69用递等式简算98.766×987.68-98.765×987.69用递等式简算9
98.766×987.68-98.765×987.69用递等式简算
98.766×987.68-98.765×987.69用递等式简算
98.766×987.68-98.765×987.69用递等式简算
98.766×987.68-98.765×987.69
=0.001×987.68+98.765×987.68-98.765×987.69
=0.001×987.68+98.765×（987.68-987.69）
=0.001×987.68-98.765×0.01
=0.98768-0.98765
=0.00003