98.766×987.68-98.765×987.69用递等式简算
问题描述:
98.766×987.68-98.765×987.69用递等式简算
答
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