543除以6的商是两位数,估旁李算的结果是90,准确值为90.5因为6与90的乘积为540,码誉所运模迟以543除以6的结果接近90,且比90大。543÷6=90.5
876÷3≈扰昌870÷3=290,876÷3=292,所以876÷3的商是三位数,估算缓颤扒的结果是290,准确值是洞慧292.故答案为:三位数,290,292.